This image appeared on the cover of Man Alive No 22 in 1963. It's credited to Hussar Studio on the inside cover, they were an associate of Royale Studio who seemed to do less contoversial imagery. This is pure beefcake with just a hint of Royale bulge. I haven't identified the model yet, he isn't named in the magazine as far as I can see.
I've added this to the Royale 'Sailors In The Rigging' set at the mitchmen Royale Studio Open Archive.