What makes you think it is a fake?! The claim to have won medals at this or that event? That's not unusual for higher class watches of that era.
In order to tell whether the watch is fake or real, we need far more pictures. Dial, general looks and especially movement shots. Even then, if it is a more obscure make, it will not be possible to tell for 100% certain whether it is entirely original or a "mariage" (made from parts of several older watches).
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