Plate number

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For the concept in chemical separations, see Theoretical plate.
For the registration plate used for vehicles, see Vehicle registration plate.
This strip from a sheet of US stamps from 1895 shows they were printed with plate number 170.

A plate number is a number printed in the margin of a sheet or roll of postage stamps which shows the printing plate used to print the stamps.

A plate number is the serial number of a printing plate. It is printed in the selvage or border of a pane of postage stamps.[1]

Philatelists and stamp collectors analyze or collect plate numbers and stamps with different plate numbers. The American Plate Number Single Society (APNSS) is an example of a specialist philatelic society which focuses on plate numbers. APNSS is affiliate #178 of the American Philatelic Society[1]


  1. ^ a b "The American Plate Number Single Society". Retrieved December 13, 2010. 

External links and further reading[edit]