Silver wax seal buy stamp, antique French (1)

Pretty sterling silver wax seal stamp with an elaborate floral decoration. It probably dates from the 19th buy century, but isn't marked. It is engraved with amonogram I can't decipher. The seal stamp is 3.3" (8,5 cm) long, it weighs 11,4 gram and is in good condition.
(no. 1)