Hello
This appears to be the mark of Joseph Adoue, manufacturing silversmith, initials JA, symbol a shoemaker’s awl (alène de cordonnier). Adoue worked in Paris at 22 rue Saint-Sauveur. He registered his mark 2 times: 4 August 1857, erased 12 August 1862; and 21 July 1863, erased 2 November 1877.
During the first part of his career, Adoue specialized in repairs, making of fine flatware, and small tableware. He then had a brief association with Charles Vallet, making small tableware. Finally in 1863 he was in business on his own again.
Adoue was the successor of Gayton, and was succeeded by his nephews Labat & Pugibert.
This attribution is tentative: you don’t show a Minerva mark to indicate manufacture in Paris, and there is only 1 initial and a symbol to go by.
Regards.
See Arminjon, v. II, no. 02291, p. 216.
See David Allan, p. 291.