This unique model is equipped with a day/night indicator at the 6 o'clock position and a semi-skeleton at the 9 o'clock position, which allows the eye to enjoy the movement of the movement, which is the charm of mechanical watches. Driving system: Mechanical Caliber: F6L24 Average daily deviation: +25 seconds to -15 seconds (static accuracy) Running time: 40 hours or more Case Material: Stainless Steel Glass material (front): Spherical sapphire crystal Glass material (back): Inorganic glass Luminous Light: - Band Material: Stainless Steel (SUS316) Band width: 21 mm Arm circumference: 140 mm - 200 mm Inside clasp: Push-fold tri-fold type Weight: 149 g Vertical diameter: 49.5 mm Width: 42.0 mm Thickness: 14.0mm Water resistance: 5 atmospheres Antimagnetic resistance: Class 1 Other Features: Automatic winding (with manual winding), Seconds hand stop device, See-through back, 22 jewels Warranty: 1 year Date of release: November 2017