D. Christopher's Claymo, Riga, CDev initials 1729-1748.

CFCClaymo Master Clemens Carl Friedrich - Tallin - Initiators CFC - 1768-1793.

C-F-B-BClaymo Master Bradenberg Carl Frederick - Leningrad - initials C-F-B-B

C-M-SClaymo Master of Steel Carl Magnus - Leningrad - initials of C-M-S - 1830-1849

CMSClaymo Master Charles Magnus - Leningrad - initials of CMS 1830-1849

Л.Ф.Г.Claymo of an unknown master of Odessa - initials of L.F.G.

JBHThe stigma of the master Hertz Johann Bernhard - Leningrad - initials "JBH"