The
Frank's slide is no doubt labeled 'Muscle Beach' because the seller also has this slide from
1952.
Now
THIS is MUSCLE BEACH!
Orig
1952 Muscle Beach, Santa Monica CA 35mm Kodachrome Photo Slide
eBay
I believe I recognize the guy in the blue speedo-like trunks. I've seen him in an old video clip of a celebrity's beach party in Malibu.
He's an actor.
Lastly, the eBay seller has this slide, also from
1952.....
"Orig 1952 Muscle Beach, Santa Monica CA 35mm Kodachrome Photo Slide"
eBay
This, most definitely, is
not Muscle Beach. I don't even think this is California.
.