Looks like you have a nice Cal 19-9 CH, from Minerva.
By: amanico : March 13th, 2013-13:05
Which should be housed in a 46 mm case. From the Fourties, it is described as a Pilot Watch. Well, you need to do some work on it, to clean the dial and polish the plexy, to service the movement, but it is worth it! Best, Nicolas.