Category Archives: guide book of american postcards

The crossroads of numismatics and deltiology: Mary L. Martin and Q. David Bowers

What do numismatics (the study of currency) and deltiology (the study of postcards) have in common? Much more than you might think. Both studies make extremely popular collectible hobbies in the forms of coin collecting and postcard collecting, respectively, and both are a method of preserving and studying history

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