HomeNumismatic TermsSWIMS Serial Number - Ambigrams on U.S. Paper Money

SWIMS Serial Number – Ambigrams on U.S. Paper Money

(n.)

A SWIMS serial number is a type of so-called “fancy” serial number found on United States paper money that appears identical if read upside down and right side up. It is also known as a “flipper”.

An example was featured in Cool Currency! Episode #1, as seen below.

 

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CoinWeek Notes
CoinWeek Notes
CoinWeek Notes presents expert analysis and insights from Charles Morgan and Hubert Walker, the award-winning editors of CoinWeek.com.

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