Claymo Probe Master of the Great Ustuga - Cerkas Nikolai Grigorievich - initials of the N-C - 1856-1862.

The stigma of the test master of Chekasov Nikolai Grigoryevich with the image of the initials "H" and "H", a line passes between the initials and the year, the year "1861" is indicated below.The master was determined by the test master in the city of Veliky Ustyug in 1856, died in 1886 (1856-1862) Form: rectangle