The image is from the cover of the Sept., 1952
Sports Afield, and the pump shooter looks like this fella from a c. 1950 Peters ad (except now he's got an 870)
which is from a picture that was in that Handbook of Shooting book I promised you, but ended up giving to Frank Finch for the 'L.C. Smith Skeet Gun' display at the NRA meeting this summer.