Quote:
Originally Posted by ALR-bishop
You could collect hobby recognized variations, recurring print defects, one time print defects, out of registrations, wrong backs ( or fronts  ), blank backs, proofs, miscuts , or just some of the above. Sometime back I chose to stick to recognized variations and recurring print defects on the theory there has to be some limits 
I still wonder if one searched long enough you could find a variant for any pre 1981 post war card ( The only pre war set I collect also has a variation for each card in the set ) |
I'm almost certain that would be possible. Post 1981, say through at least 1991 it's almost guaranteed. Haven't found all of them yet, but have found differences that should affect the entire set.
Some of them of course are really trivial, or only visible with a magnifier.
Steve B