Selection of the stamp by the letter "Г.С.К."

Brands of Russia by the letter "Г.С.К.".

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Claymo of an unknown master Leningrad - initials of G.S.K. - after 1908.

Г.С.К. Claymo of an unknown master Leningrad - initials of G.S.K. - after 1908.

Claymo of an unknown master Leningrad - initials of G.S.K. - after 1908.

Г.С.К. Claymo of an unknown master Leningrad - initials of G.S.K. - after 1908.

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