Hello, I've acquired this watch and whilst I'm not concerned about its value I just want to know if it is authentic, it keeps good time and I like the look of it. It was owned by a U.S. serviceman who was stationed in Europe at the end of WW2 and for the subsequent 10 years. There are a few aspects of the marks and serial number that don't match with other similar examples of this watch I've seen. I believe the serial number, 920842, dates it to 1943 but I've not seen 'SWITZERLAND' marked on the back of Universal Geneve watches from this period only 'swiss' or 'swiss made’. I would also like to know if I should get it cleaned and serviced, not the face though. I'd appreciate it if someone could take a look and let me know their thoughts on it.