Swiss quarter repeating octagonal brooch watch Circa 1810

Brooch watch with visible balance, probably by Piguet & Capt Geneva
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A Swiss gold and enamel quarter repeating brooch watch likely converted from a ring, circa 1810–1815. The watch features a gilded movement with a cylinder escapement, and it repeats on a bell recessed into the backplate. It has a white enamel dial with Arabic numerals, blued steel moon hands, and an aperture for a diamond-set visible balance. The gold octagonal brooch-form case may have been converted from a ring watch, with a chamfered bezel of blue translucent enamel set with opaque white roundels. There is a repeating slide on the right case side, and the back is set with a hinged brooch pin and a sliding panel to reveal apertures for winding, hand-setting, and regulation, all with directionals.
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Dimensions: 21 x 32 mm
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Signed: no name
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These watches are better known as ring watches, mostly from the workshop of Piguet & Capt Geneve. The design of the balance is very typical. Extremely rare are examples with a repeater.