Since 1993, the Seamaster Diver 300M has enjoyed a legendary following. For today’s modern collection, OMEGA has embraced that famous ocean heritage and updated it with the brand's most advanced innovation and design.

This 42 mm model is crafted in 18K Sedna™ Gold and features a diving scale on the bezel in positive relief. The dial is matte white ceramic and includes polished waves in positive relief, a date window at 6 o’clock, as well as 18K Sedna™ Gold skeleton hands and indexes that are filled with white Super-LumiNova.


The watch is presented on a brown rubber strap and is driven by the OMEGA Master Chronometer Calibre 8801, which can be seen through the sapphire-crystal on the wave-edged caseback.

Features
Anti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Chronometer: Label given to a watch which has been successfully tested by an accredited and independent laboratory in order to receive a certificate compliant with the chronometer ISO 3159 standard.
Date: The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o'clock.
Helium escape valve: Decompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term underwater work, crude oil exploration, etc.)
Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).
Screw-in crown: Self-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.
Transparent caseback: A transparent caseback - frequently made of sapphire - makes it possible to see the movement inside the watch.
Unidirectional rotating bezel: A bezel which turns in only one direction. Particularly useful for divers who cannot accidentally rotate it in the wrong direction, which could cause them to miscalculate their dive times. A rotating bezel makes it easy to measure elapsed time.

Technical Data
Reference: 210.52.42.20.04.001
Between lugs: 20 mm
Lug‑to‑lug: 49.93 mm
Thickness: 13.92 mm
Case diameter: 42 mm
Case: Sedna™ gold
Dial colour: White
Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
Water resistance: 30 bar (300 metres / 1000 feet)
Total product weight (approx.): 153 g
Calibre: Omega 8801
Movement type: Self winding
Power reserve: 55 hours

Strap
Strap color: Brown
Strap type: Rubber strap
Strap surface: Rubber
Strap underside: Rubber
Buckle type: Pin buckle
Buckle material: Sedna™ Gold