This is a lovely watch with rich gold plating. The gold plating is so rich and has the patina of solid gold. It has the following stamps at the top of the watch. This is a FRENCH made pocket watch. The stamping "S&G OK.OR 10 Micro" provides precise details regarding the exact metallurgy and thickness of your vintage French or Swiss watch case:S&G: This is the maker's mark for the case manufacturer (Schluchter & Cie / Simon & Geneva). They were a well-known European horological casing company specializing in layered metal watch finishes.OK / .OR: "OR" is the French word for gold. The prefix "OK" is shorthand indicating the metal composition mimics gold quality standards (often associated with gold rolled or plated finishes intended for French-speaking markets).10 Micro: This specifies a heavy plating thickness of 10 microns (μ m). A 10-micron gold layer is highly durable for electroplate, designed to withstand decades of daily use and friction without rubbing off to the base metal.Would you like help identifying the movement model inside the case or pinning down the approximate decade it was manufactured? **The glass face case is missing** The watch winds and works. I welcome your questions prior to bidding.