Found these at the Internet Archive's collection of public domain TV episodes.
From the 1960 series Outlaws
, a western which aired on NBC:
Alfred Ryder, at 44, in "Shorty":
Skip Homeier, at 30, in "The Rape of Red Sky:"
At least I think it's Skip. Gerald Mohr was in the same
episode, and they sort of resemble each other.
Leonard Nimoy, at 29, as a hired gun in "Shorty":