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Monochrome Essentials: Reviewing the Omega Seamaster Planet Ocean 600M GMT GoodPlanet › WatchTime - USA's No.1 Watch Magazine omega seamaster planet ocean chronograph 9300 review

Monochrome Essentials: Reviewing the Omega Seamaster Planet Ocean 600M GMT GoodPlanet Written by
Frank Geelen
January 11, 2015 share   tweet   share  

In 2005 Omega launched its Planet Ocean collection, a second collection of dive watches, positioned above its Seamaster Professional collection (the James Bond watch) and it has been a huge success since Day One. The Seamaster Planet Ocean is available in two sizes, 42-mm and 45.5-mm, and in 2011 Omega introduced the Seamaster Planet Ocean Chronograph 9300 , which we at Monochrome Watches reviewed and photographed for you here . Two years later, in 2013, Omega introduced the long-expected Seamaster Planet Ocean GMT. We’re going to review the Omega Seamaster Planet Ocean 600m GMT Goodplanet for you today.

The Omega Seamaster Planet Ocean GMT (“PO-GMT” for short), is available in the familiar color codes of the Planet Ocean, with a black dial and silver/white markers and hands. Only the tip of the GMT hand and the word “GMT” on the dial are in orange. There’s also a special model with a navy-blue dial and bezel that is created as a tribute to the partnership between Omega and the GoodPlanet Foundation. And that’s the version that we’re looking at today. We received the version on the (very comfortable) blue rubber strap with single folding clasp and enjoyed wearing it. But let’s first start with a tiny bit of history…


Omega Seamaster watches have a long history, and through the years we’ve seen quite a few variations. The first model that was introduced in 1948 looked like what we would describe today as a dress watch and it wasn’t until 1957 that the Seamaster got the look of what we nowadays consider to be a dive watch — a round, stainless steel case with a rotating bezel and a depth rating that allows for more contact with water than washing the dishes or taking a shower. The Seamaster 300 reference 2913 has become a collectible piece and this year Omega introduced a good-looking re-issue of it ( see here ). Although Omega says the Seamaster 300 was the first in the “Professional” line, the Omega Seamaster 200m, launched in 1988, is the first Seamaster with the word “Professional” printed on the dial. It was the third version with “Professional” on the dial, launched in 1993 and unofficially called the Omega James Bond watch, that gave the Seamaster Professional its huge popularity among a much larger audience. Later, Omega added a Seamaster Professional 300m GMT to the collection. Earlier this year, Monochrome contributor Mario wrote about his experience of  wearing the newer Seamaster Professional Co-Axial 300m GMT for an entire year.

The design of the Seamaster Planet Ocean, which debuted in 2005, recalls that of the first Seamaster 300 meter models launched in 1957. In 2013, Omega finally introduced a GMT version of the Seamaster PO, and it’s equipped with Omega’s in-house Caliber 8605 with GMT time-zone function. In our review of the Seamaster Planet Ocean 600M Chrono, we concluded that its well-known competitor, the Rolex Sea-Dweller Deepsea, had some serious competition. Now we’re curious to find out whether the Rolex GMT-Master II also gets a true competitor with this Omega Seamaster PO GMT.

Overall appearance

Sporty, robust, modern, functional, stylish, elegant — just a few words to describe the new Seamaster PO GMT that I heard from people when I asked them to capture the watch in a word (or two). I also feel that all these words are applicable, along with some other words like, for instance, “comfortable.” While the other words to describe the Seamaster PO GMT will depend on the situation, it was comfortable in all situations. While comfort is not a quality that will be readily apparent on the surface, it’s a very important characteristic of this superb-all-around watch.

I’ve worn the Seamaster PO GMT with a suit and shirt, with a casual outfit and on the beach. It looked good on every occasion, with every outfit, and felt great on the wrist as well. That was in large part due to the rubber strap. While I’m not the biggest fan of rubber straps (I’d choose the version with steel bracelet) I was a bit amazed by the number of positive comments on how this one looked. The blue dial, orange accents and robust case all got a lot of very positive feedback.


The Omega Seamaster Planet Ocean 600m GMT GoodPlanet (yes, it’s quite a long name) packs a lot of interesting and very handy features. First of all, there’s the nice-sized 43.5-mm stainless steel case that is very nicely finished. There’s the in-house movement with co-axial escapement, there’s the (convenient) 60 hours of power reserve when fully wound and, finally, there’s the very useful GMT function! All these features will be described, but first we need to explain a bit more about the GMT function.

Office GMT vs. Traveller’s GMT

There are several ways to display the time in a second, time zone. Watches with a GMT function are quite common and feature an extra 24-hour hand to indicate time in another time zone. These can be divided into so-called “travelers'” GMT watches and “office” GMT watches.

The travelers’ GMT watch has an independent, adjustable hour hand, as on the Rolex GMT-Master II and all variations of the Omega Seamaster GMT (including this new Seamaster PO GMT.) This is the perfect watch for travelers because they can easily adjust the “local time” that is indicated by the hour, minute, and second hand. When you unscrew the crown and pull it into its first position, you can adjust the hour hand in one-hour increments. The 24-hour GMT hand will not be affected and keeps indicating the correct home-time. The date is connected to the local time, so you have perfect indications for the location where you just landed: the local time, local date, and the 24-hour hand will indicate your home time.

On about 99% of the other GMT watches, it is the 24-hour hand that is adjusted independently. This is the so-called office GMT watch. It allows the wearer to adjust the 24-hour hand to the correct time in a second time zone — that of a business partner on the other side of the planet, for example. You immediately see whether it is day or night in that other time zone. The hour, minute and second hand and the date will remain indicating the correct home time. When traveling, this type of GMT watch is less convenient, because when you want to adjust the time to your new local time, you also have to adjust the 24-hour hand that will not automatically remain in your home time.

As the nickname says, this is a great choice for wearing in the office. For travelers, we recommend a true traveler’s GMT.

Dial / hands

In total, there are nine variations of the Omega Seamaster Planet Ocean 600m GMT; five with a black dial and four with a navy blue dial. The blue dial is an indication for either the titanium version or for the one we reviewed, the GoodPlanet version that underlines the partnership between Omega and the GoodPlanet Foundation. The GoodPlanet version is the only one with orange numerals on the rotating bezel and an orange 24-hour GMT hand.

The dial is in the already well-known Planet Ocean style, and features style elements similar to the old 1957 Seamaster’s, just like the newly introduced Seamaster 300 . Applied on the dial are polished, faceted and rhodium-plated hour markers. Between the hour markers is a minute railtrack that has minute markers and a date window at the 3 o’clock position. Another great detail: the date disk is black and the date numerals are in white. The upper half of the dial features an applied Omega logo and name, and “GMT” in orange. The lower half shows the words “Co-Axial – Chronometer – 600m/2000ft” printed in grey/white.

The hour, minute, and second hands are polished, faceted and rhodium-plated, and coated with white Super-LumiNova which emits a blue light. The exception is the minute hand, which emits a green light, as does the dot on the 24-hour bezel. The orange GMT hand is crafted from anodized aluminum.


In terms of size, the Omega Seamaster Planet Ocean GMT finds the middle ground between the two versions of the non-GMT version Planet Ocean, which are 42-mm or 45.5-mm. In diameter it measures 43.5 mm and its height is an impressive 17.25 mm. The watch’s thickness contributes to its similarly impressive depth rating of 600 meters. That means you can wear the Seamaster Planet Ocean 600m GMT for exactly the sort of activities that its name indicates, i.e., diving! Despite its robust dimensions, it looks great with formal attire and causal outfit alike. Just don’t try to button your shirt’s cuff close, because the watch is too thick for that, and do not wear it with a dinner suit or tuxedo simply because it does not match. For all other occasions, this is a perfect all-around watch. The stainless steel case features a beautiful mix of polished and straight brushed finishing. The domed (and, of course, scratch-resistant) sapphire crystal is enhanced with nonreflective treatment on both sides that works very well. Often, when you look at the time, it looks like there’s no crystal at all.

This stainless steel watch is quite heavy; however, there’s also a titanium version for those who prefer to keep things light. Both the crown and the helium escape valve are knurled, which ensures a really good grip. The crown is “embedded” in the slightly asymmetrical right side of the case, which offers it some protection. Our test version came with a blue rubber strap with white stitching, which, as mentioned, drew many compliments and was quite comfortable.


This is the part that most often intrigues the team here at the Monochrome headquarters. And in this case (pun intended) the movement is very interesting, and we’ve covered it on several occasions before. So please check our previous articles and I’ll be short and sweet with the description today. Since Omega is going to introduce its new Master Co-Axial movements  into the entire collection, we would not be surprised if this Seamaster PO GMT will be equipped with Omega’s 100% anti-magnetic movement soon.

The self-winding movement is equipped with Omega’s three-level Co-Axial escapement and Si14 silicon balance spring. The two mainspring barrels are mounted in series and, when fully wound, deliver 60 hours of power. The rotor winds in both directions, to reduce winding time, and is finished with exclusive Geneva waves in arabesque.

The verdict – pros and cons

This is the easy part for me to write, because the Seamaster Planet Ocean 600m GMT GoodPlanet is overall a superb watch that I can definitely recommend. Yes, it has an annoyingly long name. But the size is just right, as is the weight, the options for strap or bracelet offers choices for people who prefer a steel bracelet or a leather or rubber strap. And even if the weight is too much, you can opt for the titanium version. I’ve been a fan of the Seamaster Planet Ocean since the first moment I saw it. Now that it has been equipped with a GMT function (to be precise, a traveler’s GMT), it has become even more complete. In my opinion this is the best alternative for those who want an alternative to the Rolex GMT-Master II. It’s actually the only real competition for Rolex in this segment.

(Interesting fact: Omega even offers a full four-year warranty.)






share   tweet   share   3 Responses to “Monochrome Essentials: Reviewing the Omega Seamaster Planet Ocean 600M GMT GoodPlanet”
Show all responses Brian August 13, 2016

I’m not sure why I don’t find much mention of this, unless there really aren’t many actual SCUBA divers in the five watch fan club — a hallmark of all dive watches is a unidirectional rotating bezel that indic aajrnyyo. omega constellation prezzoates the number of minutes a diver is submerged under water — the Planet Ocean GMT bezel has a bidirectional 24 hr bezel that reads the GMT, but there is no measurement for time under water. This is a GMT watch that CANNOT DIVE. NO ACTUAL DIVER WOULD USE IT FOR DIVING. The bezel doesn’t provide the info necessary in a dive watch. Therefore, the 2000+ feet of water resistance and helium escape valve found on Planet Ocean GMT models are merely decorative and not useful features.

Reply Winston January 11, 2017

it took me a day to research on this.. as I have only found 1 answer so far from a similar article..

Here’s one of the comments

AnonymousDecember 10, 2013 at 1:38 AM

Clearly you don’t understand the diving function of the rotating bezel on the Omega PO (GMT).

Maybe they put the luminescent spot on the rotating bezel to use as a diving timer? Example: you start diving at 10:30 am and have 20 minutes of oxygen. Set the luminescent spot at the 10 o’clock hour marker (on the dial) and you’ll know when to go back to the surface when the minute hand reaches that marker.

There’s no need for the 24 hour markers on the bezel in the dark though ;-)

Reply Debashish January 11, 2015

This is truly a fantastic watch!

Thank you for your lovely article as well as nice pictures!

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Replica Omega Omega Seamaster Planet Ocean Automatic Calibre 8500 And Chronograph Calibre 9300 Watches For 2011 Watch Releases 42 Comments April 5, 2011 by Ariel Adams Omega Seamaster Planet Ocean Automatic Calibre 8500 And Chronograph Calibre 9300 Watches For 2011

In addition to the new for 2011 Speedmaster Co-Axial Chronograph Automatic watch , Omega offers a new  Planet Ocean Seamaster Co-Axial Chronograph Automatic watch with the new in-house Omega caliber 9300. There is also a three-hand Seamaster which also has in-house made Omega caliber 8500 automatic. These new pieces are fantastic, and show just how dedicated Omega is to making its two core sport watch collections better and better.

One quick note for you watch movements nerds. The original caliber 8500 for a few years ago did not have a silicon hairspring, but all the new versions do. What you see here the range of new pieces for 2011. I want to start with the more simple three-hand Seamaster Co-Axial Automatic. There will be black and blue version. The blue will have Omega's Liquidmetal bezel, but not the black one yet. Last year Omega came out with a limited edition Omega Planet Ocean Seamaster with a Liquidmetal bezel, this was to test the new ceramic/metal bezel. Since then Omega has acquired the rights to Liquidmetal 100%. This means they plan on going full scale with Liquidmetal soon, but right now they are still ramping up their ability to industrialize its use. Though, I will say that the blue Liquidmetal bezel watches are not limited in production.

At 45.50mm wide the Seamaster Planet Ocean Co-Axial Chronograph Automatics are large but good-looking (the three-handers are the same size). The case size is really perfect on the wrist due to shorter lugs, and the Caliber 9300 movement is a great addition. I discussed it a bit more here when debuting the new Omega Speedmaster Co-Axial Chronograph Automatic . The same movement fits and works the same way in Seamaster, but the hands have been adapted for dive watch use. The blue version with Liquidmetal is in titanium, which the black version is in steel. Omega ups their titanium quality to grade 5 - whereas they used grade 2 for some of their previous titanium watches. The polish is great, and the titanium looks light steel in person of finishing, save for that it is lighter and a bit more gray in tone. Oh, and the lume of the dial is fantastic. All blue SuperLumiNova, but the minute hand is in green for easier sight underwater and the dark when seeing the different between the hour and minute hand.

Shall we not forget the orange version of the Seamaster Planet Ocean Chronograph with the caliber 9300. A few years ago the orange Seamaster Planet Ocean chrono was one of the hottest watches around. Omega updated the look and offers a few upgrades as well over former models. I still love those "broadarrow" hands on the Planet Ocean models.

More so than ever the Seamaster Planet Ocean feels like a high-end watch. Detailing is superb and everything seems to work as promised. I love how nicely the bracelet wraps around your wrist and the dial elements are crisp. Both the chronograph and three-hand models are water resistant to 600 meters, and have well-done AR coated sapphire crystals. They also have sapphire exhibition casebacks.

While the chronograph is a cool range, my pick is the three-hander. Not that there is anything wrong with the chronograph, but I like the Speedmaster more for a chronograph model. For me a true diver is all about clarity and three hands. The Seamaster Planet Ocean with the caliber 8500 is just that. A great in-house automatic movement, super refined case and dial, and a nice large size. In titanium it is light and just a dream. While I typically choose black, the blue version is really well-done as well.

New for 2011 is a rubber strap that is incredible. It looks like leather, but is rubber with an almost sparkly finish. The tactile experience is impressive, and wearing it is exactly what you want when using a rubber strap. This is one of the best out there and Omega does a great job integrating it with the case. I also love the new deployment clasp that hides the excess strap on the wrist side.

Not sure on pricing yet, but they will all be under $10,000 of course. The Speedmaster with the 9300 was about 7,300 Swiss Francs, so you can expect the Seamaster chrono to be a bit more, and the three-hander to be a bit less. Everyone is eager to have all Liquidmetal dials. It will be a bit before Omega offers the full range with the great bezels, but they promise it is coming soon. With desirable movements and the high-performance features you expect from a Seamaster Planet Ocean, these new large watches do the collection proud and will find a happy place in most anyone's collection. Shall I not forget! There are also 42mm wide Seamaster Planet Ocean with the 8500 automatic movement, and 37.50mm wide version for the ladies with the older Omega Co-Axial 8250 or 8251 movements.

#gallery-2 { margin: auto; } #gallery-2 .gallery-item { float: left; margin-top: 10px; text-align: center; width: 20%; } #gallery-2 img { border: 2px solid #cfcfcf; } #gallery-2 .gallery-caption { margin-left: 0; } What do you think? Thumbs up   ( 1 ) Interesting   ( 1 ) Classy   ( 0 ) I love it!   ( 0 ) I want it!   ( 0 ) See more articles about:
Chronograph Watches Ladies' Watches Omega Planet Ocean Omega Seamaster Titanium Watches Watch Brands Omega Posts navigation Previous Post Maurice de Mauriac Chronograph Modern Tactical Vision Watch Review Next Post Cartier Calibre Watch Now With Bracelet Bio Ariel Adams Fueled by an unshakable love for horology and a general curiosity for intricate things, Ariel Adams founded aBlogtoWatch in 2007 as a means of sharing his passion. Since then, ABTW has become the highest trafficked blog on luxury timepieces, and Ariel has become a contributor to other online publications such as Forbes, Departures and Tech Crunch, to name just a few. His conversational writing style and inclusive attitude brings a wider appreciation for watches the world over, and that's just the way he likes it. Follow me on Google+ Ariel Adams About aBlogtoWatch

Established in 2007, publishes watch buying guides, timepiece reviews and horological articles viewed by over one-million people worldwide each month.

ABTW strives to provide enthusiasts, consumers and watch collectors with the highest calibre of watch related information. We work for our audience and our coverage is as honest as it is passionate.

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Tahir Khan

Why oh why!!! did they get rid of the wave pattern on the dial…still prefer the original seamaster

Kris C

Really? The first thing I was going to say was how nice this is with an untextured dial – the shade of blue and the application is very rich and looks great on it’s own. I was never a huge fan of that wavy dial.


The PO never had a wave dial, you are thinking of the Seamaster 300. Although, the new ones don’t have a wave dial anyway.

hubert pellikaan

Hi Ariel,

I still love the omega seamaster planet ocean!

There are some comments i do have on these watches, both positive as negative: + it has the cool case shape with the bent down lugs crown protection is nicely integrated, without silly steel things sticking out a seriously good turning bezel dial design that leans heavily on the 1967 seamaster300

– the bent down lugs do not stick out as low as the 1967 seamaster the shiny things around the hour markers are not handy (same with the submariner!) white /luminova hands are way better visible a shiny edge to the speedy subdials add glam, not beauty

Cheers, Hubert

Dean Grant Baker

the colour blue has been PROVEN scientifically to be the easiest colour to view under water; it is ALSO the last of the visible spectrum the human eye can detect under water.

Mike K

[citation needed]

Rich B

They are nice but prices are very steep. Here is the price list..

Planet Ocean with bracelet (steel): 4600 €

Planet Ocean with rubber-strap (steel): 4500€

Planet Ocean Chronograph (steel): 6100 €

Ti Planet Ocean: 6400 €

Ti Planet Ocean Chronograph: is around 7800 €


I really like those first few pics. But do I see a black date wheel on a blue dial?!