Punch
Perforation A form of cancellation where a hole or pattern of holes is punched across a stamp. PVA, PVAD Abbreviation for Polyvinyl Alcohol (q.v) and Polyvinyl Alcohol Dextrin gums on reverse of stamps.
Perforation A form of cancellation where a hole or pattern of holes is punched across a stamp. PVA, PVAD Abbreviation for Polyvinyl Alcohol (q.v) and Polyvinyl Alcohol Dextrin gums on reverse of stamps.