Omega · Seamaster
Seamaster Diver 300M
Ref. 210.30.42.20.01.001
currentMaster Chronometer 8800DocumentedLast reviewed Not yet reviewed
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Authentication Notes
Dial
Medium
Ceramic dial with raised laser waves
The 2018+ dial is ceramic with a raised, laser-engraved wave pattern; a flat printed wave dial belongs to earlier references.
Movement
HighHigh confidence
Caliber 8800 Master Chronometer
The current Diver 300M uses the anti-magnetic (15,000 gauss) co-axial 8800 with a display caseback. A closed caseback or an ETA-based 1120 indicates an earlier generation.
Inspection points
No inspection checklist has been published for this reference.