A contraction of 'PERForated INitials', also called SPIFS
(a contraction of 'Stamps Perforated by Initials of Firms and
Society's')
Are small holes in the stamps forming letters or figures,
for to avoid missuse or theft
Perfins stamps can also be found in the category
specimen stamps (many as annulee), booklets and postal stationery as this postcard form Germany.
