I don't quite get by the '57 Baseball checklists are so difficult to come up with, but here is the deal. Got the Blony 1/2 checklist in nice shape. Need the rest. Let me know if there may be any leads out there. I expect a lot cricket sounds on this posting.
This isn't much help but I just picked up a 1957 set and it included two marked checklists - 3rd series (blony - thst you apparently have) and first series (Bazooka). So if marked is ok - I have a lesser condition one available.
I don't have the 3rd series...are they cleanly marked? What are you needing for settings or looking for in your collection?