I recently bought a broken trench watch and am in the process of repairing it. Got the movement working after a good clean and fixing main spring issues. But there is no marking at all, not even mentioning the contry of origin. There is also no marking on the case. Any feedback on a possible brand or calibre would be very welcome. The movement measures 29.8 mm (outer) and 28.3 mm (inner).
Thank you for your help. I will post further pictures once I have clean the rest of the watch and put all back together.