Seamaster Diver 300M Automatic 36.25 White Gold / Black / Rubber

In Context

At 36.25 mm it is classically proportioned: the size a dress watch was understood to be for most of the twentieth century, and small enough to sit under a cuff. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 300 m is a professional diving rating, far past any demand a wrist is likely to make of it.

The movement winds itself from the motion of your wrist. 42 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

2652.50.91 stands on its own in this catalogue — no other reference here shares its base number. It pairs a black dial with a white gold case.

The 1120 is the chronometer-grade automatic of the 1990s Seamaster: an ETA 2892-A2 with Omega's finishing and adjustment, certified by the COSC. It powers 92 watches in this library. The 2892 is the thin automatic base most Swiss maisons built on, and the [2892 piece](/blog/the-eta-2892) explains why. Omega's version runs at 28,800 vph with a 42-hour reserve and 23 jewels, at 25.6 mm across and 3.6 mm high, and it is the movement of the Seamaster Professional 300M from 1993 until the [Co-Axial 2500](/calibers/omega-2500) took over in 2005, including the blue-dial 2531.80 that succeeded the quartz Bond watch in the films. In the library it powers 54 [Seamaster Diver 300M](/brands/omega/seamaster-diver-300m) references, the 41 mm and the 36.25 mm mid-size, 17 [De Ville](/brands/omega/de-ville) Prestige automatics, 14 [Constellations](/brands/omega/constellation) and 7 [Seamaster 120Ms](/brands/omega/seamaster-120m). Cases run from 22.5 mm to 41 mm, with 41 mm the most common at 35 references. The [1109](/calibers/omega-1109) is the non-chronometer version of the same base, and the [1538](/calibers/omega-1538) the quartz movement the Seamaster offered beside it.

91 other watches in the library run the Omega 1120.

Omega

Seamaster Diver 300M Automatic 41 Stainless Steel / Black / Bracelet / Japan

2251.50.00 · 41 mm

Omega

Seamaster Diver 300M Automatic 36.25 Stainless Steel / Black / Bracelet / Japan

2250.50.00 · 36.25 mm

Omega

Seamaster Diver 300M Automatic 41 Stainless Steel / Electric Blue / Bracelet / Ian Thorpe

2256.80.00 · 41 mm

Omega

Seamaster Diver 300M Automatic 41 Stainless Steel / Blue / Bracelet / Japan

2251.80.00 · 41 mm