This is a cool watch with a Navy & White face and a popular chronograph model by the world's top brand SEIKO. The watch has a stylish design with a calm atmosphere and is recommended for both casual and suit style. The watch is equipped with a 1/20 second high speed center chronograph, date calendar, double locking buckle, 100m water resistance, etc. Movement: SEIKO quartz Material: Stainless steel Small Seconds Date calendar Screw back Double-locking three-fold buckle Size: Case (diameter) approx. 38 mm x (thickness) approx. 10 mm Arm circumference: Approx. 16-20 cm Weight: approx. 110g Accessories: SEIKO box, warranty card, etc. ※ Due to Seiko's shift towards paperless operations, the inclusion of printed instruction manuals is gradually being discontinued. As a precaution, here is the URL for the English instruction manual for this model's caliber (7T92): https://www.seikowatches.com/jp-ja/-/media/Files/Common/Seiko/instructions/English/7/7T92/7T92.pdf Please rest assured that we will notify you via message in case of any changes to the URL.