1940s Eterna “Gilt Clamshell” | Waterproof | Unpolished

This is an exceptional and rare Eterna black gilt dial watch, encased in a sought-after “Clamshell” waterproof case. Produced in the 1940s, this Eterna features a beautiful glossy gilt dial. Additionally, the watch is in excellent condition. The case is unpolished and razor-sharp, while the dial remains incredibly glossy and remarkably well-preserved. As the story goes, in 1936, Schmitz Frères et Cie of Grenchen filed a patent (No. 189190) for a three-piece watch case, where the movement is encapsulated in a steel “Clamshell”, It consists of a three-part case, one part fitted over a unique flared crystal, pressed to the center body, those two parts are then clamped together and screwed down at four different points under each lug. This was a revolutionary design adopted by a few brands and now they are among the most sought-after chronograph designs.  CONDITION The watch is in great condition, the case is very sharp and unpolished, and the dial is clean and bright glossy.