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Omega Seamaster Diver 300M Chronograph 44mm, Sedna Gold

Reference 210.62.44.51.01.001. A sheet to take with you: the numbers to check the watch against, what to look at, and what to ask. It does not authenticate anything and it does not tell you whether to buy.

Check the numbers

Measure or ask. A watch that does not match these is not necessarily wrong, but it is a question worth the answer.

Anything above marked not recorded is a gap in this catalog, not a property of the watch. Do not read a blank as a zero.

Before anything else

A Sedna gold chronograph, and the single most useful thing to know is that this reference IS a chronograph. It is routinely listed as a plain Seamaster Diver 300M, which is a different and much cheaper watch.

What to look at

1. dial Chronograph registers present
   Correct Two subdial registers plus small seconds, with Sedna gold rings
   Red flag A three-hand dial, which is a different reference entirely
2. dial Laser-engraved waves in relief
   Correct Waves standing proud of a polished ceramic surface, catching light separately
   Red flag A printed wave pattern flush with the dial
3. movement Cal. 9901 and Master Chronometer papers
   Correct Column-wheel chronograph with a 60-hour reserve; METAS certificate matching the watch
   Red flag A missing certificate on a watch sold as full-set, or a reserve well short of 60 hours
4. case Sedna gold colour continuity
   Correct Even alloy colour at wear points, lugs and bracelet interfaces
   Red flag Any colour change at an edge, which indicates plating

Known issues on this reference

• Omega's own model name for this reference is "Seamaster Diver 300M Co-Axial Master Chronometer Chronograph 44 mm". A listing describing a three-hand diver at this reference has the wrong watch or the wrong number.
• Sedna gold is Omega's own red-gold alloy and is not the same as a plated case. Wear through to a different colour underneath is decisive.
• The dial is black ceramic with the waves in positive relief, and the subdial rings and hands are Sedna gold rather than plated brass.

Parts that are commonly replaced

• Rubber straps are consumable and replaced routinely.
• Ceramic bezel inserts are replaced after damage; ceramic chips rather than scratches.

Ask the seller, whatever the watch

• When was it last serviced, by whom, and is there paperwork?
• Has the case ever been polished?
• Which parts are not original to it?
• Do you have the box, papers and the original bracelet or strap?
• Why are you selling it?
• Can I see it in daylight, and can I take a photo of the caseback?

What this sheet is standing on

The specifications above are sourced to omegawatches.com, watchesbysjx.com. What else the catalog does not know.

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