Don't heed @eBoy (flame free zone, remember?), he likes jokes more than it's good for him.Very instructive post, thank you.
I've just purchased this watch at theonewatches.io:
Omega - Speedmaster DSOM "Black" PVD/NY Blk BTF V2 A7750 - OMG-960 | Theonewatches.ru
Omega - Speedmaster DSOM "Black" PVD/NY Blk BTF V2 A7750 - OMG-960 - SPEEDMASTER - Factory Omega SpeedMaster MoonWatch Dark Side of the Moon V2 Edition Functional 3:00 Subdial Counter with Dual Needles Made 1:1 with a Genuine Omega SpeedMaster Mtheonewatches.io
Regarding the manufacturer, it says: 'Factory Omega', that can't see in the list above. Does anyone know about it?
You bought a no-name watch, "Omega factory" means nothing but marketing trick. There are no records of these no-names around, so difficult to tell. In any case, the Speedmaster has never been properly repped even by known factories so don't expect too much.