Hand-me-down 39A without known history. Does the G (1950) look like a C (1945) but with a small diagonal line intersecting the lower leg of the C? Newbie here, so I'll try to figure out how to post a picture if needed. Thanks!

Can't post a picture at the moment; sorry. Have a hand-me-down 39A and can't tell if the letter in the serial number is a C or G. It appears to be a C but with a diagonal small line intersecting at the end of the lower leg of the C.