
Hallmarks

Moscow Jewelry Factory - "MYu38" - 1968

Moscow Jewelry Plant - "MYu37" - 1967

Moscow Jewelry Plant - "MYu36" - 1966

Moscow Jewelry Plant - "MYu34" - 1964

Moscow Watch Repair Plant "Mosremchas" …

Special Alloys Processing Plant - "Z₁S"…

Moscow Jewelry Factory - "Yu6" - 1966

Special Alloys Processing Plant - "Z₂S"…

Moscow Special Alloys Processing Plant …

Special Alloys Processing Plant - "Z₃S"…