I am also listing many other vintage, antique, and unused wristwatches. Please take a look. → #nekoneko Please be sure to read the profile. ● Product Name: SEIKO 5 SPORTS Speed-Timer UFO Made in Japan 6138-0011 Automatic Genuine SS Belt 1971 SS Case Screw Back ● Case Width: Approximately 42mm (excluding the crown) Lug Width: Approximately 18mm Wrist Size: Approximately 18cm (Please allow for some margin of error) ● This is a vintage chronograph, the SEIKO 5 SPORTS Sports Timer "Ref. 6138-0011", manufactured in 1971. It is called "Big Double" or "UFO" because of its curved and voluminous case design. The dial is a matte black dial. The red and orange accents are a 70s-like design. The calendar is a domestic specification with both Japanese and English language display. ● As this is a 53-year-old vintage wristwatch, there are minor scratches on the exterior, but there is no damage that affects wearing or visibility. The engraving on the back cover is still clear. Please check the photos. The belt is a genuine stainless steel belt with a "SEIKO 5 SPORTS" engraved buckle. ● I have checked the operation before listing. The daily rate measured by the timegrapher is very good, between -3 seconds and +7 seconds when laid flat. (The daily rate may vary depending on the position, temperature, and winding condition, so please consider it as a reference) The stopwatch button and reset button are the type that you press firmly, and they work properly. ● There may be scratches and stains that cannot be fully captured in the photos. Also, the evaluation of the item is my subjective opinion, so there may be individual differences. Please refer to the description and photos and consider. ● We will ship as quickly as possible and with careful packaging. [Also selling many items on Mercari Shops = Mercari Shop followers receive a 20% discount coupon that can be used at Mercari Shops. #nekoneko → Filter → Seller → You can go to Nekoneko-do's Mercari Shop on Mercari Shops]