I would say it's an error blank back card. In my experience, proofs usually seem to have some paperwork or documentation. If it doesn't, asking the seller a few questions always helps.
If you have a proof card and compare it to a regular card, you will notice how much more crisp and clear the image is on the proof, and the colors are always a more solid, deeper or brighter color than a regular card.
As far as more valuable, I would say yes, but to a very limited group...either to a hard core Staubach fan, or somone who's interest is only cards associated with the 1972 set, or error collectors, etc.
I collect proofs, blank backs and errors from the 1978 Topps football set and would love to have a blank back Staubach from that issue. Anyone have one? or others from the 1978 set?
I hope this helped
Happy collecting!
Always looking for any unique cards or items associated with the 1978 Topps football set (proofs, blank backs, original cartoon art, errors, etc.) contact me at
danamty@earthlink.net