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A
growing field of
numismatics
(study of money), or more specifically
Exonumia
(study of money-like objects), credit card
collectors seek to collect various embodiments of
credit from the now familiar plastic cards to
older paper merchant cards, and even
metal
tokens that were accepted as merchant credit
cards. Early credit cards were made of
celluloid,
then metal and
fiber,
then paper and are now mostly plastic.
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