Perfin Reference Materials?

Are there any good books or websites out there that help identify Perfin designs? Thanks!

*** Moved by Staff to a more appropriate forum. ***

Tons here: https://www.perfins.org/

SCF member and perfins guru tommtomm will probably help with identification if he's reading.

Great, thank you both!

Who rang? ;-)

There are some country catalogs available online, e. g. for Spain, Bulgaria, Sweden, Denmark, Finland ...

But to start, you can use this page:
http://zenius.kalnieciai.lt/
Chose the country on the left side, and scroll down to PERFINS.
Here you will find many of the smaller collections (some with pictures as well).

If you need Germany, Austria or Great Britain, you'll have to get the catalogs from the editors:

Great Britain - Perfin Society (sloper 154/memory stick)
https://perfinsoc.org.uk/catalogues-for-sale

Germany - ArGe Lochungen
https://www.arge-lochungen.de/katalog/

Austria - Gerhard Sand
https://englischeversion.gemeindeausstellung.de/
gersand@tele2.at

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I've got all available catalogs, so if you need information about special perfin stamps, just post them in the different threads here.

Denmark is a huge online resourse and the good thing you can use it for free https://www.perfiner.dk/ but I think it is only in danish, you can find the perfin and then there is a prizelist too.