Speedmaster Professional Moonphase Aventurine / Strap

In Context

At 44.25 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 45 hours of reserve carries it overnight, but not through a weekend in a drawer. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

311.33.44.32.01.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a black dial with a stainless steel case. Introduced in 2012. Beyond the time it carries a chronograph and a moon phase.

Handwound chronograph movement with moonphase and date at 12 o'clock as found in the Omega Speedmaster Professional.

7 other watches in the library run the Omega 1866.

Omega

Speedmaster Professional Moonphase / Strap

3876.50.31 · 42 mm

Omega

Speedmaster Professional Moonphase / Bracelet

3576.50.00 · 42 mm

Omega

Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Ivory

3875.20.37 · 42 mm

Omega

Speedmaster Professional Moonphase Apollo 11 30th Anniversary

3689.30.31 · 42 mm