The guy looking at the camera in the first shot is Kent Kuehn --- a regular at Gold's Gym (THE Gold's Gym!) back in the early/mid 70's. He is also in that weird bodybuilder "street scene" in the movie Stay Hungry (one of Arnold's first movies).
The other guy (in the pic posing next to Arnold) is an unknown. You'd probably have to be one of the guys at Gold's Gym (again.... THE Gold's Gym!) back in '74-'75 to know who he was??
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