Swiss. A fine 18K gold openface keyless chronometer watch

Swiss. A fine 18K gold openface keyless chronometer watch
Unsigned, stamped with casemaker's mark CF, No. 14550, circa 1900
With gilt-finished movement, 19 jewels, pivoted detent escapement, screwed gold chatons, Guillaume balance with gold poising screws, glazed dust cover, gold cuvette with engraved inscription Bulletin de l'Observatoire de Neuchâtel, the white enamel dial with Roman numerals, outer Arabic five minute divisions, gold Louis XVI hands, subsidiary seconds, in circular plain case, case, cuvette and movement stamped CF
52 mm. diam.