Mr. Maslov Mikhail Vasilievich - Moscow - initials of MM 1908-1917.

МАKlemo Master Ass M. - Vilno - initials of "AI" - 1894-1917.

ИМKlemo Master Ikin Ivan Nikolaev - Moscow - initials IM - 1886 - after 1908.

ИПХClaymo Master Ivan Petrovich - Moscow - Initiators of IPH

ПХClaymo Master of the Plebnikov Petr Ivanov - Jaroslavl - initials of PX - 1761-1776.

ЛЧClaymo of an unknown master of Archangelska, initials of the LF 1768

ИКClaymo of an unknown master of Kurska, the initials of the IC, the first half of the 19th century