[Operational / Wristwatch] Chronograph malfunction Functions such as crown operation have been verified. The watch is currently running and ready for use. ◆ Product Information [Brand] SEIKO [Model Number] 7A28-7100 [Material] Stainless Steel (SS) [Dial] Chronograph with small seconds [Movement] Quartz [Case Size] Approx. 40.5mm (excluding crown) [Weight] Approx. 86.3g [Lug Width] Approx. 2.0cm [Wrist Size / Max] Approx. 16.5cm [Accessories] None *Any included accessories are shown in the photos. ◆ Additional Information This is a 1980s SEIKO Speedmaster 7A28-7100. It is a historic model equipped with the 7A28 movement—the world's first analog quartz chronograph movement. Characterized by its red-and-blue "Pepsi" bezel and "Panda-style" three-register chronograph layout, it remains a highly popular vintage model among collectors. ◆Shipping Customs notice: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.