If ONLY between 1950 and 1970, no further, I'd probably carry a Smith 3 inch revolver in 357, with the FBI/Treasury LHPSWC loads. IF they made them during that time frame - no 158 grain LRN for me. When I was growing up, I was told during that time frame hollow point ammo was practically unheard of, until SuperVel hit the scene in 1963. The only other choice would be something in 45ACP or 44 Special, with Keith style SWC bullets in the wheel gun.
If the "1970s" is included as a decade, a Walther P-5 with Supervels until 1976, then a CZ 75, if one can be smuggled out from behind the Iron Curtain.