Since the OP has not returned, I’m continuing my monologue on this Neoclassical style eye bath. In looking again at the maker’s mark, I don’t believe the initial is an R, as the OP stated, and I do see a hint of a second initial. The lower part of the lozenge was cut off inadvertently when the object was stamped. Fortunately, the symbol of 3 winged creatures is clear.
So back to the books to look for the symbol. There are 3 possible candidates for Paris makers working 1819-1838:
-Royer as originally suggested, symbol 3 female blackbirds facing right in a triangular formation;
-François Duché, a jeweller, initials FD, symbol 3 birds facing right in a triangular formation above and an upside-down anchor below (trois oiseaux et une ancre renversée);
-Pierre-Noël Blaquière, initials PNB, symbol 3 swallows facing right in a triangular formation (trois hirondelles). Blaquière was a jeweller, specializing in fittings for travel cases (nécessaires), of which an eye bath could be one element. His mark had a border around the lozenge, with a pellet at each point.
From what can be seen of the mark, I believe Blaquière is the maker of this object. He registered in 1803-1804; no end date is given, but he was mentioned in the Almanach Azur until 1822. Therefore if he is the maker, the eye bath can be dated quite precisely to between 1819-1822. He worked at 174 rue St-Honoré, then after 1820 at the magnificent townhouse mansion, the Hôtel d’Aligre http://www.paris-promeneurs.com/Patrimo ... u-hotel-de
See Arminjon, v. 1, no. 03047, p. 300.
A very famous maker who also produced nécessaires and other objects worked at 283 rue St-Honoré, just two blocks away from Blaquière’s first address. This of course was Martin-Guillaume Biennais, Napoleon I’s silversmith.
This object is carefully executed, well marked, not frequently found on the market: nice!