Vintage Swiss mechanical wristwatch by ARSA / Auguste Reymond S.A., featuring the robust Unitas 6317 hand-wound movement with small seconds at 9 o’clock. A key highlight is the original caseback engraving “WEHRMACHTSWERK – A. REYMOND LTD”, referencing the well-known military-grade construction style used on durable Swiss movements of the era. Please note: this wording refers to the type of construction/architecture and does not imply official military issue. The dial has a classic sunburst silver tone with Roman numerals and a balanced small-seconds sub-dial. A very honest vintage piece with attractive patina and period character. Details • Brand: ARSA (Auguste Reymond S.A.) • Movement: Unitas 6317, hand-wound • Jewels: 17 rubies • Functions: Hours, minutes, small seconds (9 o’clock) • Case material: Stainless steel • Caseback engravings: “WEHRMACHTSWERK / A. REYMOND LTD / 63457” • Features engraved: Antimagnetic, Incabloc, Waterproof, Swiss • Estimated period: 08/1957 (marked “8-57”) • Strap: Leather strap (period style) Condition Good vintage condition, with visible wear and patina consistent with age. The watch is running at the time of listing; accuracy and power reserve have not been measured on a timegrapher. Please review photos carefully as they form part of the description.