Postby JayT » Tue Aug 15, 2017 12:55 pm
Hello
This looks like the mark of Jean-Joseph Bourdier - intials JJB, symbol a crayfish claw (une patte d'écrevisse - working in Paris at 16 rue de Roule beginning 1798-1799, then at at 9 rue du Coq-St-Honoré from 1813 until 1815. He was succeeded by Cebron in 1815.
See Arminjon, v. 1, no. 01872, p. 202.