Kaunas (Kovno) Assay Master's Mark - Fedor Spiridonov - initials "F-S" - 1854-1860
Hallmarks-Assay Masters
- Letter: F-S 1859
- Year: 1854-1860
- Shape: Rectangle
- Description: Fedor Spiridonov, assay master's mark depicting the initials "F" and "S" in the upper part of the mark, a dot between the letters, a line running through the middle, and the year "1859" indicated in the lower part. (1854-1860) Shape: Rectangle
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