Vacheron Constantin

Vacheron Constantin

Brand Vacheron Constantin, Geneva Model “Demi-Chronomètre” (half-chronometer) Year circa 1890-1900 Movement No. 308 678 Calibre 20’’’, manual-winding, 20 jewels Case No. 186 988 Material/s pink gold (18-carat) Dimensions Ø 51.3 mm. Thickness 15 mm. Weight 104.3 gr. (approx.) Signature dial, case and movement Accessories original fitted box; copy of the invention patent Vacheron Constantin Pocket watch, patented index-regulator; “Demi-Chronomètre” (half-chronometer); pink gold (18-carat) Pink gold (18-carat), open-face, keyless-winding, round-shaped, pocket watch, with subsidiary seconds at 6 o’clock and patented index-regulator. Time-setting by a push-pin (à poussette) located on the case-band to the right of the pendant at 11:30. Case: four-piece, “demi-Bassine à filets”, polished; pink gold (18-carat) cuvette (dome) engraved in taille-douce (fine cut) with the manufacturer’s name and serial numbers, as well as the technical specifications of the movement and the word “Demi-Chronomètre” (half-chronometer); oval-shaped clipped bow. Case-back engraved in taille-douce (fine-cut) with the cypher “M H T”. Dial: white colour enamel dial (two-piece), with black painted suspended Arabic “Dauphine” numerals, external minute track divided five by five with black painted radiating lines and external blue painted radiating Arabic numerals (13-24); blued steel “Spade” hands. Movement: calibre 20’’’, probably 20 jewels, gilded brass, going barrel, straight-line equilibrated lever escapement, cut bimetallic compensated balance with gold poising screws and blued steel hairspring with terminal curve, patented polished steel index-regulator with micrometric screw; protected inside a soft iron ring against magnetic fields.