
Hallmarks

Kostroma Jewelry Factory - "KF5" - 1965

Sidorovskaya Jewelry Factory - "FS7" - …

Sidorovskaya Jewelry Factory - "FS2" - …

Sidorovskaya Jewelry Factory - "FS6" - …

Sidorovskaya Jewelry Factory - "FS8" - …

Sidorovskaya Jewelry Factory - "FS1" - …

Sidorovskaya Jewelry Factory - "FS4" - …

Podolsk Jewelry Factory - "FP5" - 1965

Krasnoselskaya Jewelry Factory - "FK5" …

Moscow Jewelry Factory - "Yu-5" - 1965