◆ From SEIKO, a top world brand, comes the "Seiko 5 (Five) Collection Series," a crystallization of precision technology crafted by skilled artisans with years of experience. ◆ This is an automatic (mechanical) model featuring a vivid blue dial with yellow and grey accents that stand out beautifully. ◆ It features a see-through back (back skeleton), allowing you to visually appreciate the movement of the mechanical watch's rotor and balance wheel. ◆ In terms of specifications, it is sufficiently functional for everyday use, including LumiBrite luminescence, and a day-date calendar. The day-date calendar is particularly convenient. ■ Movement: SEIKO Automatic Movement (Cal: 7S26) ■ Case: Stainless Steel, Band: Stainless Steel ■ Crystal: Hardlex Crystal ■ Day-Date Calendar ■ See-Through Screw Back ■ LumiBrite Luminous Processing ■ Water Resistance for Daily Life ■ Size: Approx. 37mm in diameter, approx. 11mm in thickness ■ Weight: Approx. 105g ■ Fits wrist circumference approx. 15-20cm ■ Accessories: SEIKO box, warranty card, instruction manual (copy), etc. （Please be aware that due to the current replacement period for the "SEIKO box," there is a possibility that you will receive a "SEIKO box" different from the one shown in the image. We ask for your understanding in this matter.）