The Titanium Field Guide

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 is a discontinued diver watch with a grade 5 (bracelet grade 2) titanium case. At 169 g it sits among the heavier diver watches in the guide. It ships on a matching titanium bracelet rather than a strap. No longer offered new; listed here as an archive reference for the used market.

All Omega watchesExotic-material diver 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 is the case material of the Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer?

The Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer has a grade 5 (bracelet grade 2) titanium case with a titanium (display, sapphire) caseback. This is confirmed against the maker spec.

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

It is 55.0 mm in diameter, 18.26 mm thick, 48 mm lug to lug, and water resistant to 1200 m.

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

About 169 g (w/ bracelet).

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

It is no longer offered new; the guide keeps it as an archive reference for the used market.

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