Fine Swiss minute-repeating chronometer pocket watch Circa 1920

Minute-repeating gold keyless chronometer pocket watch
–
A very fine, minute-repeating, 18 carat gold, keyless, lever chronometer pocket watch. Made by  Vacheron & Constantin, Genève Circa 1920.
Four-body, bassine and polished case. Hinged gold cuvette with engraved inscription.
Brushed silver dial with champlevé Breguet numerals, outer minute track and subsidiary sunk seconds. Blued steel Breguet hands.
Rhodium-plated movement with 29 jewels, straight-line lever escapement, cut bimetallic compensation balance with 8 adjustments, blued steel Breguet balance spring, swan-neck micrometre regulator and repeating on gongs activated by a slide on the band. Dial, cuvette and movement signed.
–
Diameter: 47 mm
–
Signed: Vacheron & Constantin, Genève-Suisse