Not sure of the year of your Catalog but SCD does list the gray backs for 52 and 54 in separate listings just after the regular listings. They are referred to I think as Canadians, which may be a misnomer. There are several good threads on the gray backs and their values in this forum. Gray and white back differences in the same series exist in 52, 54, 56, 59 and 60, but 52 and 54 carry the biggest premiums, and are hardest to find
Last edited by ALR-bishop; 05-01-2018 at 12:38 PM.
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