SPEC movement Automatic winding (BALL caliber RR1102-C) Swiss C.O.S.C. certified chronometer (high accuracy within -4 seconds to +6 seconds) function Hour, minute, second hand, date and day of the week display 15 self-luminous micro gas lights on the hands and dial Impact resistance 7,500Gs impact resistance (passed an impact test equivalent to the impact received when dropped from a height of 1.5m onto a wooden floor) Waterproof 300m waterproof Anti-magnetic 80,000A/m (mu-metal inner case) Case stainless steel Unidirectional rotating bezel Anti-reflection treated sapphire glass screw-down crown "Safety Lock Crown System (Patented)" screw-down crown size Bezel diameter: 43.2mm Thickness: 16.5mm Weight: Approx. 235g band Stainless steel tapered bracelet with extensions and folding clasp on both sides to withstand 1400 newtons of force dial black Equipped with a self-luminous micro gas light on the metal index Micro Gaslight boasts outstanding functionality, but it is also true that there were limits to the design approach if it was attached directly to the index on the dial. The solution to this problem was a new technique in which Micro Gaslight was mounted on top of three-dimensional metal indexes with sharp edges. Furthermore, the diffusion effect of the light reflected by the metal indexes also contributes to the brightness of the micro gas light, which emits light in the dark, by 20% more than the standard model. Unparalleled Safety Lock Crown System The safety lock crown system (patent number 132700), which is adopted in many models of "Engineer Hydrocarbon", is one of the identities of ball watches. Screw the crown to the correct position and lower the protection plate to secure it. This alone makes it possible to protect the crown, which is the weak point of mechanical watches, while increasing waterproofness and shock resistance. Two-point fastening of the bracelet increases strength and safety The two-point fastening of the end piece is a common detail in the Engineer Hydrocarbon series. This is a measure to prevent the bracelet from falling off, but in order to achieve this, the end piece itself must be a solid part. At the same time, you can feel the commitment to robustness, and at the same time, it is proof that sufficient consideration has been given to the quality of the bracelet, which affects the feeling of wearing it.