Auguste Tschanz, Ecole d'Horlogerie de Saint-Imier，機蕊號 1917，錶殼號 1917，57 mm，151 g，約 1917
卓越非凡的專業懷錶，附時計擒縱及"Three Bridge Tourbillon"三橋陀飛輪，另附在1949年6月14日榮獲Bulletin 1ère Classe del'Observatoire Astronomique de Neuchatel的一級認證影本
Auguste Tschanz, Ecole d'Horlogerie de Saint-Imier, Movement No. 1917, Case No. 1917, 57 mm, 151 g, circa 1917
An outstanding graduate's work with chronometer escapement and "Three Bridge Tourbillon" - with a copy of the Bulletin 1ère Classe de l'Observatoire Astronomique de Neuchâtel from June 14, 1949
Case: silver, polished, glazed movement, à goutte, gold crown, bow and hinge. Dial: enamel, radial Roman hours, auxiliary seconds, blued spade hands. Movm.: three-bridge movement, German silver, mirror polished and bevelled steel bridges, screwed gold chatons, finest mirror polished, bevelled tourbillon steel cage, spring detent escapement, large Guillaume gold screw compensation balance, blued flat balance spring with 2 terminal curves by Phillips, fine adjusting device with gear and gear segment, gold escape wheel.
Auguste Tschanz (1876-1967)
Tschanz worked for Longines and was responsible for the design and the production of complicated watches. In 1913 he became a professor at the watchmaking school in Saint-Imier and taught there until 1940.
Described in detail and illustratred in "Das Tourbillon" by Reinhard Meis, Munich, 1986 p. 148f.
机蕊 非常好, 走動正常