French silver Montre de Souscription pocket watch Circa 1817

Silver open faced Souscription watch by Breguet
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A French silver open faced Montre de Souscription pocket watch, circa 1817. Originally sold in 1817 with a gold case and white enamel dial, customized with a silver dial in 1828 and probably got the silver case at the same time.
Breguet precision movement, ruby cylinder escapement, central winding, temperature compensation, main plate signed Breguet.
Silver dial with Roman numerals and blued steel hands signed Breguet et Fils. Plain case. Movement numbered.
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Diameter: 65 mm
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Weight: 186 g
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Signed: Breguet et Fils