Speedmaster Moonwatch Co-Axial Titanium / Blue / Bracelet

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. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 60 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

311.90.44.51.03.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue dial with a titanium case. Beyond the time it carries a chronograph.

The 9300 is Omega's first in-house chronograph, introduced in 2011 with a column wheel, a vertical clutch, two barrels and the co-axial escapement. It powers 51 watches in this library. It was designed as a chronograph from the start rather than adapted from a base, and its signature is the dial: two subdials instead of three, with the 12-hour and 60-minute counters combined at 3 o'clock so an elapsed time reads like a clock. The Si14 silicon balance spring, the free-sprung balance and bidirectional winding follow the 8500 family, and two barrels give 60 hours at 28,800 vph with 54 jewels. It is COSC-certified; the [9900](/calibers/omega-9900) is the Master Chronometer version that succeeded it in 2016. In the library it sits under 15 [Speedmaster](/brands/omega/speedmaster-automatic-quartz) Co-Axial Chronograph 44.25 references, 13 [Speedmaster '57s](/brands/omega/speedmaster-57) at 41.5 mm, 10 [Planet Ocean](/brands/omega/seamaster-planet-ocean) chronographs at 45.5 mm, 7 [De Ville](/brands/omega/de-ville) chronographs at 42 mm and 6 [Dark Side of the Moons](/brands/omega/speedmaster-dark-side-of-the-moon). The 44.25 mm case accounts for 21 references. The [3313](/calibers/omega-3313) is the Piguet-based chronograph it replaced, and the [1861](/calibers/omega-1861) the hand-wound Moonwatch movement the Speedmaster automatics sit beside.

50 other watches in the library run the Omega 9300.

Omega

Speedmaster Moonwatch Co-Axial Stainless Steel / Black

311.33.44.51.01.001 · 44.25 mm

Omega

Speedmaster Moonwatch Co-Axial Stainless Steel / White / Bracelet

311.30.44.51.04.001 · 44.25 mm

Omega

Speedmaster Moonwatch Co-Axial Stainless Steel / White

311.33.44.51.04.001 · 44.25 mm

Omega

Speedmaster 57 Co-Axial Stainless Steel / Black Vintage

331.12.42.51.01.002 · 41.5 mm