Rare Swiss gold eight day Hebdomas lever watch Circa 1920

Gold watch with eight day movement and visible balance
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A rare Swiss 14 carat gold open faced Hebdomas pocket watch, circa 1920. The keyless eight day movement with a club foot lever escapement, an uncut bimetallic balance with overcoil hairspring and a large mainspring barrel covering the reverse of the watch.
Off white enamel dial with off center time indication featuring radial Arabic hour numerals, an outer minute track and blued kite/diamond hands, gold decoration on either side, a gilt, finely engraved bridge below over a polished steel regulator and visible balance. An engine turned case back with a central vacant cartouche, polished bezels, band, pendant and bow.
Dial signed 8 Jours Hebdomas.
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Diameter: 46 mm
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Weight: 78 g
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Signed: No name
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Reference No. 0010000
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A Hebdomas pocket watch in 14 carat gold is rare and hard to find.
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The case with some very small dents.
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The name Hebdomas is derived from the Ancient Greek word for week/the seventh day. It refers to the watch’s ability to run for at least a week on a single winding.

A Hebdomas pocket watch is a timepiece known for its eight day, hand wound movement, off center time indication and a visible balance wheel mounted to a dial side bridge, a feature that makes Hebdomas watches instantly recognizable, and is typically gilded and engraved with a decorative floral motif. A massive mainspring barrel covers the entire diameter of the movement, rotating around the center similar to an automatic rotor.

Most Hebdomas watches feature the name centered in the dial and 8 Jours engraved on either side of the balance. Mostly also featuring a flower or arrow design above.
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Reference 0018000