Omega Pocket Watch

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Hello all & Happy Holidays 😀
I recently picked up this Omega pocket watch but don't know anything about it so I was hoping someone could shed some light on it.
I have several Illinois and Hamiltons which I have no issue finding information on but I don't know where to start with this one.
The movement seems to measure around 45mm (that's measuring from the ring just outside the movement)
Anyway, thank you in advance for any info.