1956 Topps grey back set
Not long ago I finished my 1956 Topps set and made a point of only having grey back cards for the entire set (a couple of series were printed in either grey or white back stock)
I know there's a slight value difference in the back stock between the series, that aside, would you put a premium on a set like that?
I'm not looking to sell by any means. Just curious. There are several sets in which a variety of back stock was used (1959 comes to mind) Do you look for coordination in the backs like that or does it not matter?
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