Swiss gold verge, gold and enamel cartouche dial Circa 1820

Gold pendant pocket watch with cartouche dial
–
A Swiss verge with gold and enamel cartouche dial in a gold engine turned open-faced case, circa 1820. Full plate gilt fusee movement. Finely pierced and engraved bridge cock with steel coqueret, plain three-arm gilt balance with blue steel spiral hairspring. Silver regulator dial with blue steel indicator. Gold dial with engine turned centre, enamel minute ring, and cartouches of Arabic numerals separate by engraving, blue steel Breguet hands. Engine turned 18 carat open face case with ribbed middle, the sprung front bezel opened by depressing a button in the pendant.
–
Diameter: 34 mm
–
Signed: No name
–
In excellent condition, apparently unused.