This is a Seiko 5 Sportsmatic. This item is from a collector's collection. Model number: J13081 It is a self-winding watch with 21 jewels. EGP Dolphin Mark The calendar does not originally have a quick date change function. There are scratches, marks, and dirt from aging. There are also some areas where the gold plating has peeled off. The spring bar is bent, so please consider it as a bonus. The history of overhaul is unknown. Although I have not measured the daily rate in detail, it is currently running at about -1 minute. Please note that this item is sold as is.