This is a Blue & Black tone 1/20th second chronograph from SEIKO, the world's top brand of chronograph watches. This model is designed for executives with a white dial and silver-tone case accents. The watch is stylishly designed and also has a calm atmosphere, so it is recommended for both suit and casual style. The specifications also include a chronograph with 1/20-second counter, date calendar, and luminescent finish. Movement: Quartz "7T92 Stainless steel case and belt 3-fold buckle Date calendar Crown guard Lumibright luminescent coating Water resistant to 50 meters (5 atmospheres) Size: (diameter) approx. 40 mm, (thickness) approx. 10 mm Arm circumference: approx. 16 to 20 cm 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.