Serviced and battery replaced (Maxell battery) in December 2025 (Moonlight Watch Repair, Usami, Ito City) It is in mint condition. This is the ±5sec/Yr Deviation precision watch. The most accurate Seiko watch ever sold to date. In 1978 in Japan, this watch was sold for 230,000Yen. As a comparison Rolex Explorer (SS) was sold at 197,000yen. It has Never been polished. (on purpose) It comes with the original box and an unused warranty card. The previous owner purchased this as NOS Non-used old stock from an old watch shop. Among the many I’ve collected over the years, this is by far the best condition Seiko Superior. Along with the original paulownia-wood box with outer seiko paper. It also comes with the original paper bag that came along with the sale in the 70's, which is also in pristine shape. (it is near new condition) Extreme rare set.