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The Omega Seamaster Planet Ocean GMT Dark Grey is reference 215.92.46.22.99.002, a 45.5 mm ceramic-and-titanium dive watch with a GMT movement and a 600 m water-resistance rating. Omega’s Hong Kong English product page currently says the model is no longer available; that is the status of Omega’s listing, not a measure of secondary-market stock.
What is the Omega Planet Ocean GMT Dark Grey reference?
The full model name is Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer GMT Dark Grey, reference 215.92.46.22.99.002. The reference distinguishes this grey version from other Planet Ocean GMT editions, including Deep Black and Big Blue. Omega lists the model on its official product page.
How large is the case?
Omega specifies a 45.5 mm case diameter, 51.50 mm lug-to-lug length and 17.40 mm thickness. The lugs are 22 mm wide, and the listed approximate total product weight is 107 g. Those dimensions make this a substantial watch; diameter alone does not capture the space it occupies across the wrist, while thickness is also worth considering if a lower-profile fit is important.
What are the case and dial made from?
Omega describes the case as grey silicon nitride ceramic (Si3N4). The bezel and helium escape valve are sandblasted Grade 5 titanium, with a silicon nitride ceramic inner ring; the dial is sandblasted Grade 5 titanium as well. The grey dial has orange details, a date window at 3 o’clock, and blackened hands and indexes filled with white Super-LumiNova.
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- Brand New Omega Seamaster Planet Ocean 215.30.44.22.01.001
- Black Dial & Black & White Bi-Directional Rotating Ceramic Bezel
- Self Winding Automatic Master Chronometer Movement
- Brushed Stainless Steel Case & Bracelet
- Date Feature, GMT 2nd Time Zone Feature, Helium Escape Valve, Anti-Magnetic Feature & 60 Power Reserve
A domed sapphire crystal with anti-reflective treatment on both sides protects the dial. The black-and-grey structured rubber strap closes with a Grade 5 titanium folding clasp. The 22 mm lug width is a stated dimension, but it does not by itself verify that a particular aftermarket strap will fit.
What movement and water resistance does it have?
The watch uses Omega’s self-winding Co-Axial Master Chronometer Calibre 8906 Ti. Omega states a 60-hour power reserve, Master Chronometer certification and resistance to magnetic fields of 15,000 gauss. These are manufacturer specifications, not results from independent testing presented here.
Omega rates the watch to 600 m / 2,000 ft water resistance. The helium escape valve is part of the specification, but the rating and component descriptions do not establish that every use case is appropriate; follow Omega’s guidance for operation and maintenance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the Dark Grey model still available?
As of 5 October 2026, Omega’s Hong Kong English product page labels reference 215.92.46.22.99.002 no longer available and displays: “Sorry, but this watch is no longer available.” That wording describes Omega’s listing. It does not establish whether an authorized retailer or a secondary-market seller has the watch in stock, or what it costs elsewhere.
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Best Value
- Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.40.20.03.001
Rank #4
- OMEGA Seamaster Planet Ocean 232.90.46.51.03.001
Rank #3
- Blue Dial with Arabic Numeral and Index Hour Markers, Minute Track, Date Window, Luminescent Hands and Hour Markers
- Stainless Steel Case and Bracelet, Case Diameter: 43.5mm
- Anti-Magnetic, Resistant to Magnetic Fields Reaching 15,000 Gauss
- Self-winding Automatic Chronometer Movement, COSC Chronometer Certified and Co-Axial Escapement
- Scratch Resistant Sapphire Crystal with Anti-reflective Treatment, Exhibition Case Back
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
