You are correct - it has Mod 64-3 stamped inside the yoke area. Gun is in very good shape - Dad loved his guns and really took care of them. Gun fires nicely and is fairly accurate, even with a newbie firing it. Thanks for the fast response - you guys are awesome.
I am the lucky recipient of a beautiful .38 Special CTG. The number on the base of the grip is BAB2591 and the yoke shows 6644X. 3" barrel. Any info on year and possibly value? No way I am selling, but curious about it. Thanks in advance. Pics below