Eight-Day Watch with the Balance Turning in the Dial, c.1920s
This Hebdomas 8-day pocket watch dates to around the 1920s and carries the maker's best-known feature: a fully visible balance wheel set into the lower half of the dial, driven by a mainspring barrel large enough to span the entire movement. That barrel cover, the engraved gilt plate visible through the aperture, is not a separate dust cover. It is part of the movement itself and rotates gently as the watch runs, a genuine curiosity most owners never notice until it is pointed out.
Hebdomas built its name on this design from 1889 onward, and by the 1910s and 20s the Schild & Co factory in La Chaux-de-Fonds was producing thousands of these movements a week. What makes this particular example unusual is its size. At 41.6mm exactly, it is a genuine mini compared to the standard 48-52mm case most Hebdomas watches were built in, a variant that is far less commonly seen.
The case is nickel/chrome-plated base metal rather than silver, carrying only light handling wear with no dents or plating loss. The white enamel dial is clean, with the signature dual-language 8 Jours / 8 Days text either side of the balance aperture and small gilt rose motifs at 4 and 8 o'clock. The crown winds smoothly and pulls out cleanly to set the hands, the case back opens correctly, and the watch runs well and consistently when wound. It has not been professionally serviced.
Vintage pocket watches, and 8-day models like this in particular, have seen renewed collector interest in recent years, with well-presented examples commanding a premium over raw auction lots. This is an honest, undamaged example of a genuinely collectible early 20th-century Swiss design, sized smaller than almost any other Hebdomas on the market.
