Swiss. A 14K white gold and black onyx bracelet watch

Swiss. A 14K white gold and black onyx bracelet watch
Signed Tiffany & Co., Switzerland, movement signed Ed. Koehn, Geneve, no. 85125, case unsigned, circa 1920
With nickel-finished lever movement, 18 jewels, bimetallic compensation balance, the silvered matte dial with Roman numerals, in circular case with filigrée band, diamond and black onyx-set bezel, similarly decorated triangular-shaped hinged lugs, the 14K white gold bracelet with engraved scroll decorated flexible slim lugs, dial and movement signed
22 mm. diam. & 165 mm. overall length