Smolenska's unknown probe is the initials of FU 1790.

Features
- Alphabet
- ФУ
- Years
- 1790
Description
The glue of an unknown propulsion master, the upper part of the brand is marked by the initials with two FS letters, the year 1790 below. (1790 g)
Similar hallmarks

Г-ОMark of the assayer Tbilisi - Odintsov Grigory Ivanovich - initials "G-O" - 1887-1894.

1801 Г-ЛThe Yaroslava Probe Claymo - Lucins Grigori - initials of G-L - 1766-1805.

1780 С-БClaymo Probe Master of Moscow - Belkin Stepan - initials "S-B" - 1778-1788.

1788 А-ФClaymo of an unknown Moscow probe, initials of A-F, 1788.

П-К 1878Smolenska's unknown probe, initials of P-K, 1878.

КИThe stigma of the unknown test testing master Ryazan - the initials "ki" - 1780-1804.
