Swiss gold and enamel watch with chronoscope dial Circa 1820-30

Unsigned digital cylinder pocket watch
–
A rare Swiss, gold enamel pocket watch with floral champlevé enamel ornamentation, circa 1820-30.
Jewelled movement with cylinder escapement. Gold polychrome champlevé enamel decorated case, on the front digital time display. Silvered dial, apertures for digital jumping hours and minutes. Dome falsely signed, in script: Breguet à Paris. Inside back cover with inscription 30750. Outside dust cover marked: ECHAPPEMENT A CYLINDER QUATRE TROUS EN RUBIES/ Breguet a Paris (in script) 173750; inside dust cover: 30756.
–
Diameter: 44 mm
–
Unsigned.
–
Chronoscope
The correct term for what watchmakers call a chronograph.
A chronoscope shows intervals of time, while a chronograph, strictly speaking, ought to record time.