Seiko Skyliner 21 Jewels 6100-8000, manufactured in 1969 Winding the mainspring and time adjustment have been confirmed. Overhauled. Adjusted to gain 10 seconds per day when laid flat. Daily operation confirmed. The exterior and glass have been polished as much as possible. Case size: 36mm wide, 42mm long, 10mm thick Original band, approximately 17cm in size 【A557-10910】 Overhauled items have been disassembled, cleaned, lubricated, and defective parts replaced by dedicated watchmakers. They are in a condition suitable for everyday use. The exterior has been polished as much as possible. We take care not to dull the edges. There will inevitably be some scratches and dents that cannot be removed. There may also be scratches that do not appear in the photos. *Please check the condition of the item in the images. We take great care in packaging, but in the unlikely event of damage upon arrival, we will provide proper repair services, so please purchase with confidence.