Engine is the first "skeleton watch" from Vostok Europe. A brand-new SII NH72A automatic movement is used as the centerpiece of this Limited Edition watch (state October 2021). Its precision, reliability and power reserve have the ideal specifications for such a genuine watch. The inner workings of the "skeleton" are plated with the element Ruthenium which ensures the amazing looking grey color. At the screw-in bottom of the watch is a porthole to reveal the other side of the movement. Not only the screw-in case back but also the screw-in crown account for the 300 meters water resistance. For best readability Vostok Europe chose the vertical alignment of the Tritium tubes (GTLS) on the dial and add 3 extra tubes on the hour and minute hands. Each piece comes with a total of 2 straps (silicon and leather) in an original Vostok Europe Dry Box which also includes a tool to change the straps. The included leather strap is handmade from vegetable tanned leather in Italy. NH72A Japanese automatic movement (manual winding possible ) Second stop function (for precise time adjustment) Very durable and reliable Power reserve: approx. 41 hours Date calendar with quick setting via the crown Shock protection Watch case: stainless steel PVD Skeleton build The inside workings of the movement are plated with Ruthenium Diameter: 46 mm Height: 15.6 mm Weight: approx. 130 g Water resistance: up to 30 atm. Glass: anti-reflective, hardened K1 crystal Engine lettering and VE logo are placed on the inside of the glass Crown: screw-in Illumination: Swiss Made gaseous tritium light source (GTLS).The vertically mounted tritium tubes provide an enhanced illumination of the whole watch. The fluorescent time exceeds conventional illuminants by far. 3 additional GTLS tubes on the hour and minute dials Unidirectional bezel with a diver's scale Engraved serial number 2 straps in total (leather and silicone): 1x pre-mounted strap, 1x additional strap Buckle: robust pin buckle out of stainless steel The strap can be removed with the included tool or with any 1 cent coin Impressed Vostok Europe log Original Vostok Europe Dry Box Tool for switching the bracelet/straps Warranty pass with operating instructions