In the BIG GAME RIFLE by O'Connor published in 1952 there is a picture of Bradford O'Connor shooting Jack's 7x57 that was built on a Czech VZ-24 action. Metal work was done by Tom Burgess of Spokane and stock done by Russell Leonard of Spokane.
Gun Digest 1974 Jack said the rifle was built on a VZ-33 action.
Tom Turpin did an article on Tom Burgess in Gun Digest 2016 called TOM BURGESS - METALSMITH EXTRAORDINAIRE. His research found that Burgess built the rifle on a VZ-24 action.
Was O'connor's memory not so good 22 plus years later? I would think if he had the rifle built in 1951 and published a reference to it in 1952 as VZ-24 it is a VZ-24 action.
