Selection of the stamp by the letter "СМ"

СМ Claymo Master Markov Sysa Fedorov - Jaroslavl - initials of SM 1761-1762.

СМ Claymo Master Measoidov Sem. - Moscow is the initials of the SM. 19th century

СМ Claymo Master Murin Sergey Flegotov, from Podol, initials of SM 1898.

СМ The color of the unknown master, with the red initials of the SM, the end of 19 - the beginning of the 20th century