1970 topps proofs? Printing error ? Help
 

Hi
Found these in a group of 1970 topps I purchased . Are they printing errors? Any value to them ?
Thanks and sorry if the images are sideways
Matt

Those are very cool. Blank backed? Yes to a premium value. Not sure as to how much, sometimes hard to say with these types, but I imagine several collectors, myself included would show interest.

The backs seem to be normal

It seems like the black printing is missing from the fronts. The grey border areas the 1970's cards are known for would be created during that step, the names would appear and the dark areas, like on Miller's sleeves, would be intensified.

Thanks for the input - moved the thread over to the discussion board

Pretty awesome.