Claymo Master Yakovlev Mikhail - Moscow - initials of IA - 1821-1823.

КПKlemo Master Konstantin Yakoljevic - Moscow - initials of KP - 1835-1875

И.КClaymo of an unknown master of Vlogda - initials of I.C. - 1843-1845.

H.TClay Master Tallberg Henrik - Leningrad - Initiates "H.T"

ПАClaymo of the unknown master of Novgorod - initials of the "P" - 2nd half of 19th century

И-ЯClaymo Master Yarosevsky Ivan - Kiev - Initiators I-I - 1822-1829.

М-КClaymo Master of Matvey Borisov - Moscow - initials of MK - 1805-1808.