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Genrerally wrongback and printing error cards are not significantly more valuable than their correctly printed copies. The main reason is printing errors happen all the time and are usually random. It never known exactly how many of the error cards slipped passed quality control. Many collectors consider them junk and don't chase after them. Then there are other collectors who go on mad hunts for them. It is this second group of collectors that might pay a little extra for a card like this.
Personally I fnd them intereesting but I will not pay extra for one.
I collect: Baseball, Football, Hockey, Mostly Vintage pre1980, My Homie teams - Washington/Baltimore Teams Senators (Twins, Rangers), Expos/Nationals, Redskins, Capitals, Bullets/Wizards - HOFers - Non-sport (mostly TV shows and movies).
My Trade List is very much a work in progress
CaptKirk42s Trading Card Blog Curly W Cards Strive For '65 YouTube klandersen42