Gold & enamel Watch no. 51547

Case: Yellow gold & blue enamel, the reverse engine turned with banners & foliage and a blue enamel circle, case no. 51547. Dial: Silvered, engine turned, Breguet numerals, signed "Ralph Dewey, Paris - New York", blued steel spade hands. Movement: 16''', nickel, bi-metallic balance with flat blued balance spring with polished steel kidney piece, signed "Haas, Extra Adjusted 5, Eighteen 18 Jewels, Swiss" and numbered "51547" on main plate. Provenance: ???? - Haas Neveux, Geneva 1992 - Antiquorum 17 octobre 1992 est 4000-5000CHF, sold 8050CHF "B. Haas Neveux & Cie., Genève-Paris, Swiss, No.51547, made for Ralph Dewey, Paris, New York, circa 1910. Fine 18 ct. gold and enamel, very slim keyless dress watch. , C. Three piece, massive, bassine pincee, fully machine engraved with foliage motives and a blue champleve enamelled line on the bezel and the back. D. Silver engine-turned with Breguet numerals. Blued steel spade hands. M. 16-, nickel plated, fausses côtes decoration, 18 jewels straight line lever escapement, cut bimetallic balance, extra adjustment, Breguet balance spring. Signed on the dial, case and movement. In excellent condition. Diam. 45 mm. 20?? - eBay ???