This watch is currently non-working. I am able to set the time, but I am not able to wind it or get it to function otherwise (I am also not sure if this watch can be wound, or if it takes a battery)  Stamped 10K filled gold plate M5 on the back, along with a serial number. General wear on the case and quartz. The leather strap is intact but very dry and possibly unsalvageable. Thanks for looking!