Prexie

Prexie is slang for the US presidential series of definitives issued in 1938. It was long-lived, many of its values not being phased out until after the first stamps of the Liberty series were issued in 1954.

With its long period of use and multiple printings, there are shades, paper and gum types to collect. Most importantly, it has become the focus of many studies of usages of the many values, with covers and parcels being of great interest.

Its $1 value is famous or infamous for the "USIR" double-line watermark error (instead of double-lined "USPS"). Overly optimistic types have often taken ANY watermark found to be the error, where a stamp must unquestionably show an "I" or "R" or substantial parts of them.  File:US half cent Prexie.jpg|½c value. Not a president, but Franklin always seems to sneak into stamp issues nonetheless. File:US 13c Prexie.jpg|13c value File:US $2 Prexie.jpg|$2 value File:US 5c Prexie coil pr.jpg|5c coil pair 

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