Postby JayT » Wed Apr 05, 2017 7:46 am
For post-Revolutionary makers' marks there is no single source for all of France, but rather regional compilations. For Paris the authoritative book is:
Arminjon, Catherine and others. DIctionnaire des poinçons de fabricants d'ouvrages d'or et d'argent de Paris et de la Seine. Paris, Imprimerie Nationale, 1991. 2 volumes, 1798-1838; 1838-1875.[i] This reference is out of print, but can be found on the secondary market. It is expensive (€€€-€€€€).
For Paris maker's marks after 1878, the French Ministry of Culture website picks up where Arminjon leaves off.
Good luck in your research!