The Perfin Society - Perfins, Philately, Stamp Collecting
Perfin Great Britain Used Stamp A25P44F19815 | eBay
Stamp Perfins: it is not just 'OS' out there! Show us yours. - Postage Stamp Chat Board & Stamp Forum
The Perfin Society - CLASSIFICATION
Elusive Great Britain Official perfins, 'The Spirit of the Nation' cinderella, faraway islands and their stamps: Inside Linn's Stamp News
UNITED KINGDOM - CIRCA 1952: Postage Stamp Printed In The UK (perfin "OP"), Shows Queen Elizabeth II, Circa 1952 Stock Photo, Picture And Royalty Free Image. Image 33602110.
Perfin on Great Britain Used Stamp A22P16F8727 | eBay
Perfin on Great Britain GB Stamp Used A21P3F4306 | Great Britain, Stamp / HipStamp
Perfin on Great Britain Used Stamp A22P16F8724 | eBay
Perfins: maximum challenge, minimal cost
GB : Official Perfins Identified Here. - Page 13 - Stamp Community Forum
The Perfin Society - FAQ
Online Catalogues GB
Great Britain : PERFINS | The Stamp Forum (TSF)
Chris Green Stamps - Did you know? Perfins were introduced in Britain in 1868 and in the United States in 1908. To put a stop to the pilfering of postage, companies began
Discover Perfins! | - Delcampe Blog
Lot - Great Britain Perfin Stamp Collection
Stamp Perfins: it is not just 'OS' out there! Show us yours. - Postage Stamp Chat Board & Stamp Forum
Stamp perfins-what exactly are they? - The Stamp Echo
