Or anything that repeatedly banged on the edge. Sometimes these are called Dryer Coins (tumbled around in a commercial dryer) - but those tend to have hits on the faces too (tumbling isn't only on the edge). Silver Dollars that were used in slot machines for several years have the same look.
-----Burton
50+ year / Life / Emeritus ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
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