Bautte & Moynier. A fine and attractive 18K varicoloured gold, diamond and ruby-set openface cylinder watch with matching key

Bautte & Moynier. A fine and attractive 18K varicoloured gold, diamond and ruby-set openface cylinder watch with matching key
Signed Bautte & Moynier a Geneve, circa 1820
Gilt-finished cylinder movement, plain three-arm brass balance, engine-turned gilt dial, Roman numerals surrounded by an applied varicoloured gold floral decoration, circular case with finely chased varicoloured gold scroll floral decoration in high relief, diamond and ruby-set bezel, the back with a star-shaped ruby-set decoration, movement signed
44 mm. diam.