The GB Perfin Society have published a free 30 page e-booklet as a download from their website titled Perfins - Some Notes for a Beginner. It is found on their home page, just scroll down the page to find the download box. While mainly addressing GB perfins it does make mention of other countries and produces a league table of issues using the US Clubs 2008 survey and figures known or estimated in 2026. I apologise for not providing the link but I haven't posted enough messages to be eligible. Also worth a mention on their website, under Catalogues select Online Catalogues and there is a long list of free catalogue downloads for various countries, some by the Society and others from members. The authors would all appreciate new information.
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