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Perforation

Perforation are holes punched between stamps to make separating easier. A Perforation Number (such as 10 or 11x10) indicates the number of holes in a space of 2 centimeteres along the edge of a stamp.

The difference between stamp perforations


Perforation: 11
Scott number: # 552

Perforation: 11*10
Scott number: # 578

Perforation: 10
Scott number: # 581

Imperforate
Scott number: # 575

Perforation Gage


Misperforation or Perforation Error