Russian 12 gauge headstamp

I was asked by a friend what 3TK (= ZTK in latin) on Russian or Soviet 12 gauge cartridges is - or was? Thank you,


As per DocAV from a IAA topic, “3TK” (Cyrillic, for Teknici Zavod Kragujevac- Yugoslavia), means Technical (Machinery) Factory Kragujevac. Here is a city link

Thank you, Sksvlad!

Sorry, Sksvlad and DocAV,

I just find that mark in my own material. It must be another maker outside Yugoslavia else because it is on an SKS clip which came out of DDR. I return to the guess it was Soviet because it is not Bulgarian (which would be marked “10” as we all know).