Watch parameters:
Movement: NH34A dual time zone GMT automatic mechanical movement
Case diameter: 40.5mm
Upper and lower length: 48mm
Case thickness: 14mm
Case material: Qin metal case with ammonia discharge valve
Strap material: Iron metal strap with quick detachable structure
Ring material: ceramic ring
Mirror: European imported double curved sapphire glass coated with anti light film
Waterproof: 300 meters waterproof