Eight-Day in Argentan, Wound Once a Week, c.1900-1920
The 8-day pocket watch was always the exception, not the rule. While the standard pocket watch demanded daily winding, the 8-day was built around an oversized mainspring capable of powering the movement for a full week - a genuine engineering difference, not a marketing claim.
This Swiss example belongs to a specific and relatively uncommon group: the conventional-dial 8-day. Unlike the famous Hebdomas watches - recognisable by their exposed balance wheel visible through an aperture in the dial - this piece uses a traditional layout with a sub-seconds register at six o'clock. That distinction matters. Hebdomas produced roughly a million examples over a century. Conventional-dial 8-day movements were made in far smaller numbers by other Swiss houses, and are encountered far less often.
The Argentan (nickel silver) case is solid and honest, showing minor wear consistent with its age of c.1900-1920. The white enamel dial is in excellent condition - no chips, no cracks, the gilt chapter ring crisp. The gilt brass movement carries a BREVET + Swiss patent mark. It winds smoothly, sets cleanly, and runs.
