Misprint with Inverted Seals and Serial Numbers
Misprints with upside down seals and serial numbers are very popular. The collector term for “upside down” is inverted. The technical term for this error is an inverted third print. There are two types. Type one inverts look like the misprint shown below. Type two misprints are also off center in addition to having inverted serial numbers.
Inverted serial number errors occur when sheets of currency are fed into the printing presses with the wrong side going first.
These errors become especially valuable if they are on star notes or something like a silver certificate. Inverted serial number misprints on a standard federal reserve note sell for about $300 in perfect condition, and $100 – $150 in circulated condition.
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