Selection of the stamp by the letter "ПТ"

ПТ Claymo Master Pavel - Leningrad - P.T. initials - 1830s.

ПТ Claymo Master Terentiev Petr - Moscow - initials of AT 1742-1745.

ПТ Claymo Master Torlov Prokopy Ivanov - Great Ustug - initials of AT - 2nd half of the 18th century - early 19th century

ПТ Claymo of an unknown master of Kurska - initials of AT - 1828.

ПТ Claymo of an unknown master of Kurska - initials of AT - 1828.