As far as as Bohemian lets say the makers from Weipert or the Czech Republic. The mark would be on the inside of the sideplate. Looking on the inside would of course require disassembly and sometime if you have someone to clean or service it, you could look then. But let me look for some instructions.

Here is some info on Russian marks and I'll keep working on the translation: http://www.gunproofmarks.ru/russia-control.html , (select "Russia", then "monitoring, compliance") http://translate.google.com/translate?hl...l%3Den%26sa%3DN . Tap on "Gunsmiths" and there are some halmarks of the craftsmen. But I have read sources and I think one to be Wirnsberger that gave "Y" as noting black powder proof.

Kind Regards,

Raimey
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