Seiko NH35 Automatic Movement: Built by the world renowned Seiko Group, our NH35 Automatic Movement is a reliable and accurate time keeping choice. The NH35 is both hacking and self-winding with a power reserve of 41 hours. For full power reserve Seiko suggests winding the crown 55 times. The NH35 has 24 jewels and a -20 seconds to +40 seconds per day accuracy. CASE MEASUREMENTSDiameter 39mm, thickness 13. 8mm, lug to lug 45mm, lug width 20mm. CASE EXECUTIONSandblasted stainless steel case with IP stealth black plating, laser engraved caseback ring and firefighter helmet caseback with coloured glass visor. Note: As our casebacks are screwdown the position of the firefighter helmet visor design will not be the correct way around. The helmet will be in the position that the caseback teeth finish on. GLASSFlush glass finished with a medium blue tint and anti-reflective coating. DIALTextured charcoal dial with rose gold applied indices filled with green Super-Lumi Nova, 3pm date window, po