☺ Overhauled and guaranteed to work ☺ ★★★ Genuine Product Guarantee ★★★ This item was purchased by my family's watch shop at a used goods market that only those with a used goods license can enter. I personally purchased and am now selling it. All watches have been overhauled and maintained, with every detail of the internal mechanisms checked, so you can be 100% assured of their authenticity. This is a high-end model of the Omega De Ville Sapphette, popular among Omega's antique watches, featuring 18KYG/750 solid gold. The original factory finish is beautifully preserved, suggesting a short period of use. The body is made of K18 yellow gold. Hallmarks indicating the purity of gold and Omega markings are engraved on the inside of the case back. The body has a combination of matte and mirror finishes, creating an elegant contrast. The movement is manual winding. The dial is silver. The watch dial is something you look at many times a day, and any noticeable dirt or aging will inevitably bother you later. You won't regret choosing one with a clean dial from the start. A black crocodile leather strap has been attached. The buckle is genuine Omega. The original nubuck strap and red box are included. The original strap appears to be in good condition at first glance, but I believe its strength has deteriorated due to aging, so please avoid using it. The diameter of the body is approximately 17mm. The timegrapher measurement shows a daily error of 0 to +5 seconds, resulting in high precision, so you shouldn't feel any error during actual use. It maintains the best condition for a vintage wristwatch, and you'll be amazed by its overwhelming beauty, which is rarely seen even in specialty shops. The image in the lower right of photo 4 was taken by a technician before overhauling this watch. Overhauling involves disassembling the movement to a certain extent to check the condition of each part, then completely disassembling it, manually pre-cleaning each part to remove oxidized/deteriorated oil and fine debris, followed by thorough washing and drying in an automatic cleaning machine. The movement is assembled while applying different types of oil to the cleaned parts. After assembly, it is placed on a dedicated tester for several days to adjust the accuracy. Mechanical watches that run on a mainspring are designed to be overhauled periodically.