Supplies with the theme Netherlands+colonies

NVPH Junior Catalogue Netherlands+Caribic Netherlands 2017/18

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You will also have noticed that these holes form a letter, various letters or perhaps an image. If this is correct, you probably have a stamp with a company perforation or (in English) perfin.Firma perforation is the common Dutch name for the English word perfin. The plural is perfins, this word is derived from perforated initials, loosely translated: perforated initials.

Posthistorische studie no. 30, Po & Po, Arnold Holleman

Posthisorische studies No. 31, Po & Po, John Dehé, Fons Simons

Posthistorische studies No. 19, Po & PO, L. Goldhoorn

Posthistorischhe studies 32, Po & Po, Kees de Baar

De geschiedenis van het openbaar vervoer in Waterland 1630-1880, met postale aspecten