I’ve just found the French silversmith that is missing in your list between Charles Peconnet and CÃ©sar Tonnelier.
It is Charles-Auguste PÃ©ret, registration nÂº 799, in the 13th of July 1835 and cancelled in 17th of August 1857. The store was on Rue Bailleul 11 and Rue Montmorency, 19 in Paris, France. Posting Requirements
I also would like to invit all to see our new Portuguese hallmarks site. It’s only one week old so it’s very little:http://sites.google.com/site/ourivesariaportuguesa