Sorry it took so long, but here are some photos of my Anthiaume piece: a fiddle thread fork. The marks, left to right, are:
Charge: Henri Clavel, large silver articles, used 31 Aug 1782-22 Feb 1789
Maison Commune: Paris, probably 11 Jul 1787-11 Nov 1788 (the same as on your piece)
MaÃ®tre-OrfÃ¨vre: Louis-Julien Anthiaume, master 6 Sep 1779
DÃ©charge: Henri Clavel, small silver/gold articles, used 7 Mar 1786-22 Feb 1789
(The circular mark at the shoulder - not shown enlarged - is the Paris large garantie mark of 1819-1838, a later addition.)
Hope this helps!