Why This Watch Matters The Gallet “Clamshell” case was reportedly the first water-resistant chronograph case made and features four screws to hold the caseback in place. The Full Story The distinct "Clamshell" case was patented in 1936 by Schmitz Freres & Co., and was acquired by Gallet in 1937. It consists of a two-part case, with one part fitted over a specialized flared crystal and then the second component. Those two parts are clamped together and screwed down at four different points, with the screws located under each lug. This is an early example and features a “monobloc” case made out of a single piece of steel; it also features an extraordinarily beautiful two-tone dial that has aged to a beautiful golden color. This is a classic example of a chronograph that merged the worlds of sport and dress together. While the period’s advertisements targeted “yachtsmen, sportsmen, and technicians,” this watch is an elegant all-purpose watch today, ideal for the office or paired with a casual t-shirt and jeans. The Fine Print Maker: Gallet Model: MultiChron 30M “Clamshell“ Reference: NA Year: Circa early 1940s Case No: 74832 Movement No: N/A Material: Stainless steel Dimensions: 34mm diameter; 11.5 mm thickness Crystal: Plexiglass, presumably original Lume: N/A Caliber: Venus manual-winding caliber 150 Bracelet/Strap: HODINKEE Navy Blue Calfskin StrapLug Width: 18mm Box/Papers: No What we Love and What You Should Know This watch has been well taken care of by previous owners. The case has been polished in the past, as is common with most vintage sports watches. The dial has aged to a warm color and shows minimal aging given its almost 80 years of age. Overall, this is a rare and beautiful chronograph.