this old design is cool....
but hamilton not associate this to any historic watch design....
a US brand but the design are more like a old german pilot watch.... so kinda funny combination!
sorry, not so much knowledge on US army pilot watch design...
so i can only think of tutima kind of coin edge bezel, german pilot kind of big oinion crown.....
but very hamilton kinda arabic number....
42mm is a normal size nowadays!