1991 error
 

what the hell is the guy talking about the 1991 upper deck hologram error? all the holograms run in a series of right side up and up side down! what a scam! the 1990 donruss is a variation however! the reg card is about 50/50.the reverse neg is 4 to 1.i did a random sampling of 100 of each! the reg card i found 53 with the period 47 with out. the reverse neg,i found 76 with and 24 with out.the 91 upper deck is B.S.!