A racing AJS in the early 60ies, I think it can't be anything else than a 7R. (New-Zealander Ginger Molloy, perhaps. He was racing in Czechoslovakia and around between GP of Belgium in Spa early July and Ulster GP at the beginning of August. He had a 7R for the 350cc races, and a Matchless G50 for the 500cc.) Actually, according to the entry list, this is the South-African rider Ian Burne, who rode the 'Continental Circus' that year. And since 50sParis gave us this shot of a rider sporting a springbok antilope on the front of his helmet, this must be Ian Burne.