I have a 1994 Ultra Rick Mirer blank back. Looks identical to the #291 Mirer regular set. However, the gold Ultra helmet logo on the lower right of card is approx. 1/8" smaller than on other regular cards of that set. it is not a mis-stamp. had to be done by design. That said, the photo on the regular photo is a bit smaller than on the blank back. To put it simply, the blank back has a smaller logo but larger photo than the regular issue. If you can see both cards side by side, you will immediately notice. Ultra had a lot of weird Mirer cards out that year as they already anointed him as the next Joe Montana. Any thoughts? Oh, first photo is the blank back, 2nd is the regular 291.