It's not exactly an ancient coin, and this is an old thread, but here's my one Louis XVI coin. Too many scratches on the obverse, but I like the reverse: AR Ecu de 6 livres françois, Paris 1792 (L'An 4), Mintmark A. Obv. Bare head Left, LOUIS XVI ROI DES FRANCOIS/ Rev. Winged Genius of France standing right, inscribing Constitution on tablet set on column; in left field, fasces topped by liberty cap; in right field, rooster standing left; REGNE DE LA LOI. In exergue, in two lines: L'AN 4 DE LA LIBERTE. KM 615.1, Davenport 1335, Gadoury 55. 39 mm., 29.4 g. Purchased March 5, 1986 from Harmer, Rooke.
I will add some of mine from Louis XVI Double Louis d'or 1786-N Montpelier Mint Louis d'or 1786-D Lyon Mint
Thanks for posting these @DonnaML and @panzerman The "ecu de six livres" isn't an easy one to get regardless of condition, this one being really decent, and those louis and double-louis are to die for. Q