★【Please do not purchase directly.】 This is a KS top-of-the-line chronometer, the "56 series King Seiko Chronometer" model. As indicated by the CHRONOMETER OFFICIALLY CERTIFIED inscription on the dial, it is known as a historical model, being the first domestically produced automatic watch to receive "official chronometer certification." Currently, it is running with a daily rate of about 5 seconds, but the day-date quickset function, a common issue with the 56 series, is not working. The oscillating lever needs repair. 【I was told it could be repaired at a watch store.】 ※ Estimated repair cost: 2,000 - 3,000 yen It is equipped with the 56 series movement made by Suwa Seikosha, with 8 vibrations per second. It is a double calendar model with an external fine adjustment device, and is not commonly found. Among vintage watches, it is a highly practical piece with a hand-winding function and hacking function. It is a masterpiece that allows you to fully enjoy the charm of an antique watch, which is etched in the history of Japanese watches. SEIKO/AUTOMATIC/CHRONO METER KS/HI−BEAT/5626−7000【Automatic】 ◎ Body: Genuine original / Medallion ◎ Calendar (Date) ◎ Three-fold buckle ◎ Case size: Approximately 34mm wide x 8mm thick 【Excluding the crown】 ◎ The bracelet has been changed to a stainless steel bracelet 【Made by SEIKO】Original ◾️ The bracelet is currently about 18cm and can be made about 1.5cm larger with 4 holes. ◾️ Other company's bracelet (no extra links + case + bracelet, maximum wrist size about 20.0cm) ◾️ The crystal glass has no noticeable scratches or dirt, and I think the condition is good considering its age. ◾️ I think there are no noticeable scratches or damage on the back cover and bracelet. ◾️ The dial and hands have almost no stains or dirt visually, and I think they are generally clean. 【Accessories】None 【Oil history】None 【Annual difference】Error, not measured ・ Because it is a used item, there may be small scratches. ・ Accuracy and water resistance cannot be guaranteed. ・ This is a current listing on the premise of an overhaul. ・ Please understand and agree that there is a possibility of sudden failure or malfunction due to it being a used item before purchasing. ・ Only the watch body will be shipped. ・ The packaging will be simple, such as cushioning material. ・ It will be shipped after simple disinfection and cleaning.