Bi-color gold Wrist Watch no. ?

Case: Dial: Movement: Attributed to Niton but it is Audemars Piguet 10''' nickel Provenance: 1929 - Audemars Piguet, Brassus (No Niton) 2000 - Antiquorum 2000 - Antiquorum 19 Nov 2000, est 14-16,000chf sold 16,100 chf "E. Gübelin, Lucerne, Swiss. Produced in the 1920's.Very fine and elegant jump hour and minute, rectangular, 18K white and yellow gold gentleman's digitalwristwatch. Accompanied by a 14K yellow gold bracelet 'à petites mailles' and dedicated clasp. C. two-body, bicolor, solid, polished, white gold fluted sides and lugs, yellow gold cover with apertures for thehours and the minutes, yellow gold winding crown, case back repeating the same decoration as the cover. D. twomatte silver revolving discs with painted Arabic numerals, one for the hours, the other for the minutes. M. Cal.10''' rhodium plated, 'fausses côtes' decoration, 17 jewels, lever escapement, cut bimetallic balance adjusted totemperatures and 2 positions, Breguet balance spring.Case and movement signed.Dim. 25 x 36 mm. C. two-body, bicolor, solid, polished, white gold fluted sides and lugs, yellow gold cover with apertures for thehours and the minutes, yellow gold winding crown, case back repeating the same decoration as the cover. D. twomatte silver revolving discs with painted Arabic numerals, one for the hours, the other for the minutes. Notes Nitonwas founded in 1919 by Alfred Bourquin and Edouard Morel. They specialized in conceiving, creating, and designingwatches and movements. They made all sorts of calibers and sold directly to stores (to Gübelin for example) or to watchmanufacturers, providing either the movements or the completed watches (Chopard, Patek Philippe, etc.) Changingfashion and the 1930's economic crisis forced Niton to change. In 1940, they sold their rights to Ebauches SA., andwere finally bought by Carlo Sarzano in 1957. At that time they produced ordinary gold and metal plated watches. In1971, they became associated with Sarcar SA., also owned by Carlo Sarzano since 1948, and thus technically ceasedto exist."