Quote:
Originally Posted by bnorth
The word "proof" is thrown around like the word "error" and means something different to everyone. I know they both have specific meanings but are rarely used correctly. 
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How bout this, it's an authentic card, with a finished back and an unfinished front. Personally, I just use "proof" when it's an unfinished card; I'm probably using it wrong, but that's just how I see it.

I'm unsure if we can really know for sure if Topps used an item as a proof even if they say they did.