Czech issued Pilot watch. There were three variations from the 1930's to late 1940's. With three different dials and movements. This is the last variation with a metal dial the other two had porcelain dials. This one was made in 1946. The back says property of military affairs with serial number. The case has solid lugs no spring bars. After the soviets took over their watches took a dump to cheap stuff. They really had good aviation before WW2.

 

 

Czech Pilot with the RAF in WW2 with a issued Czech Longines pilot watch.