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Leningrad's unknown probe is the initials of P-M 1867-1869.

Leningrad's unknown probe is the initials of P-M 1867-1869.
Features
Alphabet
П-М 1867
Years
1867–1869
Shape
Direction

Description

Stamp of an unknown assay master, at the top of the stamp there are initials "P" and "M", separated by a dot, with a line passing through the middle, at the bottom of the stamp the year "1867" is indicated. (1867-1869) Shape: Rectangle.

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