Thank you very much for viewing. Ref: 5645-7000 Cal: 5645A Year: 1970s ・This is the "56GS / Ref. 5645-7000," the model that marked the end of the mechanical Grand Seiko. It's a model known for its ease of use, often called "the most beloved series in GS history." The case features a 70s-style tonneau shape, with the case edges and hairline finish well-preserved in original condition. The engraving on the back cover is clear, and the GS medallion is in very beautiful condition. The movement is a practical high-beat automatic "Cal. 5645A" equipped with hacking function and quick-change date. Winding is also good, and it is currently running well, but the quick-change date function does not work. The date will change after the hands go around twice, so please adjust it that way. Please understand this as a defect. ・Biron Biron Bracelet (Free Size) ※The Biron Biron bracelet is a vintage bracelet famous for being used by George Tokoro. ・Please understand this is a vintage item. 【Size】 Case width 36mm (excluding crown) Case length 42mm Thickness 10mm Lug width 18mm ■We are also exhibiting many other rare watches, retro goods, and unusual items. Please take a look. ↓ #atcw Analog Classical Classic Watch Retro Vintage Antique Retro Retro Future Rare Item Vintage Watch Antique Watch Retro Watch Old School Wristwatch Showa Dress Suit Business King Seiko Grand Seiko gs ks Antique Watch Dial Color: White Belt Color: Silver Accessories: None Scratches/Cracks: Yes