Thank you for viewing. This is an Omega men's wristwatch, the "Seamaster Military." It is estimated to have been manufactured around 1963. The movement is a "30mm caliber," a highly durable and easily maintainable mechanism. Well-preserved examples are rarely seen on the market. The dial is a matte black dial reminiscent of the Ranchero and Railmaster. Upon listing, the watch underwent an overhaul and careful exterior polishing by a watchmaker acquaintance in September 2025, so it is very clean. Ref: 135.006-63 Cal: 286 (Manual winding) 30mm caliber *Please note that this is an antique watch and is not water-resistant. Accuracy is approximately ±2-3 seconds per day. *This is a measured value; actual measurements may vary depending on the position and environmental conditions (temperature, humidity, etc.). Please consider this as a reference only. Crystal: Acrylic crystal (with Ω watermark) Buckle: New aftermarket (silver) Crown: Omega original crown (silver) Strap: New aftermarket leather strap (black) Size: H43.5 x W35.5 mm (37.9 mm including the crown) D11.2 mm Lug width 18 mm The strap size is currently approximately 17.0-22.0 cm. Personally, I believe the condition is good, but individual perceptions may vary, so please check the photos carefully. If you have any concerns, please refrain from purchasing. <Important> *Please read the profile before purchasing. *Although the condition is good, it is an old used item, so please understand this. *In the unlikely event that it is a fake, a refund will be provided upon proof of authenticity. (However, this is a watch that is several decades old, and we cannot guarantee that all the components are original from that time. We will delete and block any questions regarding this.) *Photos are generally taken with a smartphone. We try to represent the item as accurately as possible, but it may appear cleaner than it actually is, or conversely, the actual item may look better (in my opinion, this is often the case). *Even if there are any defects in the description or title, the current condition takes precedence. We apologize for any inconvenience, but please consider purchasing after understanding that this is a used watch.