This is a wonderful example of a larger silver pair case. Higher end early verge fusee watches were often in a pair case. Pair case refers to when a pocket watch is placed within another case (nesting), therefore two cases. Each nesting perfectly within each other and keeping the inner watch safe from damage. Verge Fusee movements were used in antique spring-powered mechanical watches and clocks. A fusee is a cone-shaped pulley with a helical groove around it, wound with a cord or chain which is attached to the mainspring barrel. Fusees were used from the 15th century to the early 20th century to improve timekeeping by equalizing the uneven pull of the mainspring as it ran down. The mainspring is coiled around a stationary axle (arbor), inside a cylindrical box, the barrel. The force of the spring turns the barrel. Size: Outside Case Diameter is 58mm. Style: Open Face Pair Case. Conditions: C 3 (The case is in Very Good condition). Conditions: D 3-59 (The dial is in Very Good condition – restorations). Escapement: Verge Fusee Escapement. Layout: Full Plate Layout. Conditions: M 3 (The movement is in Very Good condition). We consider any reasonable Best Offers – Please submit your best offers! Ashland presents the world’s best vintage and pre-owned watches and jewelry online. We offer leading brands such as Vacheron Constantin, Rolex, Patek Phillipe, Breitling and many more. We are delighted to present ongoing sales of luxury watches of all brands and price points, shop master watchmakers such as Patek Philippe, Vacheron Constantin, Rolex, Cartier and Audemars Piguet. Contact: Rick Gilbert Hours: 9 – 5 EST, Monday – Thursday Address: Ashland Investments 640 South Washington Blvd, Suite 185 Sarasota, FL 34236. Unless you request them not to be. We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior.