Posted By:
PaulThe cards look like E121s, not M101-4s. My guess is that they are real. The reason is that his Casey Stengel card lists Stengel with the Phillies, rather than the Giants. If someone was trying to fake a set, or fake a back, I don't know why they would introduce this discrepancy.
The seller has apparently gotten several inquiries about the authenticity of these cards. He has listed a few more, and they know come with an offer to send the card directly to a grader before shipping it to the winner. The offer is only good if you make arrangements in advance, which I admit sounds suspicious. But I'm still betting on authentic at this point.