Swiss quarter repeating octagonal shaped ring watch Circa 1780

Extraordinary pearl and diamond set ring watch by Achard & Fils
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An extraordinary Swiss, half pearl and diamond set quarter repeating ring watch with visible diamond set balance – with original box, circa 1780.
18-Carat pink gold rectangular shaped case with cut corners, diamonds and gold pearls, slide for repeating mechanism, push back with apertures for winding and hand set, reeded shank with triangular shaped half pearl set shoulders, and the bezel set with half pearls. Signed enamel, eccentric dial with Arabic numerals, and blued Breguet hands. The upper part with a polished disc and four curved diamond set arms illustrates a visible balance. Rectangular shaped movement, frosted and gilt, with two hammers, one bell, two barrels for going and striking train and cylinder escapement.
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Dimensions: 22 x 32 x 9 mm
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Weight: 19 g
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Signed: G(eorg)e Achard et Fils à Genève
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This is one of five known quarter repeating ring watches.
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Achard & Fils
Achard & Fils was a watch manufacturer based in Geneva. The company was founded in 1796 by George Achard under the name Achard & Cie. Later, the company changed its name to Achard & Fils. Achard & Fils was well known for its enamelled watches. The company ceased to exist in the 19th century.