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Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer

227.90.55.21.99.002 Archive · used only

The Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer was a 55 mm Grade 5 titanium dive watch with an Omega 8912 automatic movement. At 55 mm across, no other titanium dive watch in the guide is larger, out of 359. Rated to 1,200 m, it goes deeper than 93% of the 361 titanium dive watches in the guide. It is no longer made, so this page is a reference for buying one used.

All Omega watchesDiver watchesLightest, rankedGrade 5 titaniumOn a titanium braceletDisplay back
Material
Titanium
Grade / type
Grade 5 (bracelet Grade 2)
Weight
169 g (with bracelet)
Water resistance
1200 m
Reference
227.90.55.21.99.002
Type
Diver
Price
– · No longer offered; the maker's own page shows no price ("Sorry, but this watch is no longer available")
Case diameter
55.0 mm
Thickness
18.26 mm
Lug-to-lug
48 mm
Origin
Switzerland
Movement
Self-winding
Caliber
Omega 8912
Power reserve
60 hours
Complications
Time only
Colour
Grey
Finish technology
Natural finish
Caseback
Titanium (display, sapphire)
Nickel-free
Unconfirmed (clasp or buckle material not confirmed)
Bracelet / strap
Polished Grade 2 titanium "sharkproof" mesh bracelet; additional grey rubber strap included
Matching bracelet
Standard
Crystal
Flat sapphire, AR coated both sides
Display back
Yes
Dial
Grey with orange and white hands
Dial colours
Grey Orange
Lume
Super-LumiNova
Availability
No longer offered
Status
No longer offered (maker page: "Sorry, but this watch is no longer available")
Not published
Hardness, Construction, Surface treatment
High confidence Verified Sep 2026 Source: Omega Seamaster Ploprof 1200M 227.90.55.21.99.002 (maker)
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Frequently asked questions

What grade of titanium is the Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer?

Grade 5, as stated by the maker. The caseback is titanium too.

What size is the Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer?

The case is 55 mm across, 18.26 mm thick and 48 mm from lug to lug. It is water resistant to 1,200 m.

How much does the Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer weigh?

About 169 g on its bracelet.

How much does the Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer cost, and is it available?

It is no longer made, so the only way to buy one is used.

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