Antique Hebdomas 8-day Swiss pocket watch, approximately 49mm, featuring the celebrated exposed-balance design visible through the lower portion of the dial. The porcelain/enamel-style dial is signed Berthoud / Locle, while the inner case back carries the Hebdomas Watch / Switzerland trademark and appears stamped 0.800 silver. The movement is currently running during observation; service history and full eight-day power reserve have not been verified. A fine example ready for display or restoration.
✅ Genuine Hebdomas 8-day mechanical movement
✅ Swiss made
✅ Approx. 49mm case diameter
✅ Exposed balance / visible movement architecture
✅ Dial signed Berthoud – Locle
✅ Case appears marked 0.800 silver
✅ Ornately engraved case back
✅ Running during observation
Hebdomas became famous for its distinctive Swiss eight-day watch movement, recognizable by its large mainspring barrel and exposed balance arrangement. These unconventional watches remain popular with collectors because their mechanical architecture is displayed as part of the watch's visual design rather than hidden behind the dial.
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