This is the "61 Skyliner," also known as "Seiko's last hand-wound watch." It was introduced in 1961 as a popular version of the "Liner," which was known for its thin watches, and gained popularity with its wide variety of designs. This item is the "61 Skyliner," which stands out among the series. Unlike the first Skyliner and previous models, this is a non-date model manufactured with a 6-beat (21,600 bph) design. The original retail price was 7,500 yen. Although there are some scratches on the case, there are no noticeable scratches or stains, and the crystal and hands are clean, making it in good overall condition. It is a watch from about 50 years ago. Please refrain from purchasing if you are looking for the quality of a current new watch. Simple operation has been confirmed, but as it is a mechanical watch that has been stored for a long time, the operation after purchase cannot be guaranteed. Please assume an overhaul is necessary if you intend to use it regularly. ● Manufacturer: SEIKO ● Product Name: SKYLINER ● Drive System: Hand-wound - 3 hands ● Number of Jewels: 21 ● Production Year: July 1971 ● Model No.: 6100-8000 ● Serial No.: 170199 ● Dial Color: Silver Returns, exchanges, and claims are not accepted.