Here you will find links to various web sites with philatelic content as well as references to printed publications I have found useful in my research.

Web Site Links

The most useful philatelic link I have found is Joseph Luft's Philatelic Resources on the Web.  Sites are categorised so you can search on such things as "Collectors Pages", "Country Specific", "Shows and Societies" etc.  A very large number of links, frequently updated.  Well worth book marking and visiting regularly.

Stanley Gibbons have their own, recently revamped, web site.  The site now has on-line auctions, stamps for general sale, catalogues, books, etc.

The National Philatelic Society web site is hosted by a relatively new parent web site called UK Philately.

The Wimbledon and District Philatelic Society, of which I am a member, has its own web site.

The Perfins Place is a good site for information on Perfins.  There are also a few links from here to other resources.

The Perfin Society of Great Britain has its own web page.  Be warned that there are lots of annoying popup adverts on this site - the price you pay for "free" hosting!  There has been talk of moving the site because of this but nothing has happened yet.

The Story about the SPIFS and PERFINs is an excellent introduction to Perfins.  The author has given permission to anyone to download the article for personal use.

Publications

The primary source of published information on the Protective Overprints and Underprints is Appendix 2 of Stanley Gibbons Great Britain Specialised Stamp Catalogue Volume 1: Queen Victoria (Edition 12 - February 2001 being the current issue at the time of writing).  If you are a serious collector of G.B. Victoria material you will no doubt have a copy of this publication already. 

The Tomkins Catalogue of Identified G.B. Perfins (8th edition) lists all known perfins (as of 31st December 1997) on G.B. postage stamps with identified users.  This amounts to well over 8000 identities.  No illustrations are given, which keeps the number of pages down, but a detailed description is given (including a pin count) to allow cross checking with your own specimens.  The catalogue is printed on A4 paper, comes shrink wrapped (as it is unbound) and will fit comfortably into a single A4 binder.  This catalogue is available from The Perfin Society.

The Perfin Society's New Illustrated Catalogue of Great British Perfins is very much a work in progress.  This is a catalogue which, when completed, will list all perfins found on G.B. postage stamps (believed to be well over 20,000).  Illustrations are provided for each perfin along with any known information such as identity, dates of use, the stamps on which the perfin has been found, etc.  This catalogue is being issued a letter at a time.  Each section is printed on A4 paper and comes shrink wrapped (as it is unbound).  I have a copy of all the published sections which just about squeeze into three A4 Lever Arch files.  This catalogue is available from The Perfin Society.