Omega Speedmaster Calibre 9300/9301

Omega Caliber 9300

Omega Speedmaster Calibre 9300/9301

Brand Omega
Caliber Number 9300
Movement Type Automatic, Chronograph
In-House? Yes
Jewels 54
Power Reserve 60 hours
Vibrations Per Hour 28,800 bph
Components 337
Hairspring Silicon Si14
Shock System Nivachoc
Hacking? Yes
Hand-Windable? Yes
Features Hours, minutes, central chronograph seconds, small seconds at 9:00, 12 hour chronograph totalizer at 3:00, date at 6:00
Country of Manufacture Switzerland
Known Models Speedmaster models, White Side of the Moon Speedmaster, Dark Side of the Moon Speedmaster, Planet Ocean Chronograph (Add yours to the comments below…)

Omega’s in-house caliber 9300 equipped with Co-Axial Escapement for “greater precision, stability and durability” according to Omega documentation. The rotor winds in both directions to reduce winding time. Power reserve of 60 hours. Swiss made.

Other notable features of the 9300 are the co-axial escapement, silicon balance spring,  double barrels, column wheel and the ultra smooth vertical clutch system.

The picture above is of a caliber 9300 found in an Omega Speedmaster Dark Side of the Moon edition.

From the Omega site:

Self-winding chronograph movement with column wheel mechanism and Co-Axial Escapement for greater precision, stability and durability of the movement. Silicon balance-spring on free sprung-balance, 2 barrels mounted in series, automatic winding in both directions to reduce winding time. Rhodium plated finish with exclusive Geneva waves in arabesque.

Is the Omega caliber 9300 in-house?

This questions reappears constantly in the watch community. Omega calls the 8500 and in-house movement, however, many enthusiasts are hesitant in giving this designation to the movement since the movements are apparently made by ETA with Omega (Co-Axial) designs and technology. But ask yourself this, if the conglomerate Swatch Group owns Omega and also owns ETA, does that mean any proprietary movements made by ETA for Omega could be considered “in-house” since they basically live under the same roof (Swatch)?

Europa Star published this article that mentioned Omegas plans to open a new facility next to their head office, but at the time were producing the caliber 9300 in ETA’s factories…

…Until this ambitious new project is completed in the summer of 2015, however, some 500,000 Omega co-axial movements are produced for the brand on assembly lines at various facilities of the Swatch Group’s ETA division. Europa Star had the opportunity to visit the dedicated assembly line for the most recent of these co-axial movements, the Calibre 9300 co-axial chronograph at one of ETA’s six factories in its home town of Grenchen, a 15-minute drive from the Omega headquarters in Biel.

Video Manual:

Additional Resources:

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9 years ago

Is column wheel better?

5 years ago
Reply to  Bob

Yes, Column wheel, also known as castle wheel for its shape . is better than the cam lever (also known as “coulisse” in French) because it affords better precision and smoothness in the operation of the stop/run of the chronograph portion. And the vertical clutch is better than the horizontal clutch because it avoids the “jump” of the seconds chronograph seconds hand when the chronograph is activated/engaged with the push button at 2 o’clock. And these new Omega movements like the 8500, 9300 and 9900 families, have a free-sprung balance wheel, a Si14 hairspring that is vastly superior than ANY… Read more »

4 years ago
Reply to  Jorge

Thanks for the superb desctiption! Can you tell me de different between 9300 and 9900 movement? Is it worth? Thanks allot!

Jorge Robles
Jorge Robles
4 years ago
Reply to  Roman

The difference is very small but is due to the increase of Magnetic resistance due to better treatment to surfaces of the barrels and the escapement, making the 9900 METAS certified to 15000 gauss, but not the 9300. But they are almost exactly the same visually. The caliber will appear in the rotor. But both have titanium balance wheels, Si14 Hairspring and escape wheel, and the extra anti-magnetic coated surfaces in the 9900.

David Musch
David Musch
8 years ago

Please update your list of models as the Planet Ocean Chronograph also uses the 9300.

7 years ago

This has 337 components, in case you wanted to add this detail to the list.

Omega Caliber 8500 Watch Movement |
6 years ago

[…] do know for certain that Omega’s “in-house” caliber 9300 was made in ETA […]

FAQ: Which Omega Speedmaster is the Best? - WahaWatches
5 years ago

[…] there are the Speedmasters with the in-house calibre 9300 and […]

Omega Co-Axial Calibers Watch Movement | Caliber Corner
3 years ago

[…] 9300 […]

In-House Chronograph Movements Watch Movement | Caliber Corner
2 years ago

[…] Omega caliber 9300 […]

2 years ago

I have a Gray Side of the Moon Meteorite with the 9300 movement. It keeps time to within a couple of seconds a day or better, as verified against a Citizen F900 Satellite Wave GPS-synced watch. I re-sync the Omega once every couple of weeks or so when it’s drifted by more than 10 seconds. What an incredibly accurate and beautiful watch!

Robert Bolin
Robert Bolin
1 year ago

Speedmaster ’57331.

Tim Firebrace
Tim Firebrace
9 months ago

The site is unusable. After a few seconds the left half of the screen is covered by ads. I will not be using it again.

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