Delivered with an additional heavy duty black synthetic canvas strap. Horologically speaking, the GMT function was first developed to meet with both the needs and specifications of aviators and especially pilots. MOVEMENT BR-CAL. 303. Automatic mechanical. FUNCTIONS Hours, minutes, central seconds, second 24-hour time zone and date. Quick setting of the GMT hand, independently of the hour hand. CASE 42 mm in width. Satin-finished and polished steel. Bi-directional rotating bezel with 24-hour scale and black and red two-colour anodized aluminum ring. DIAL Black. Indices coated in Super-Lumi Nova®. Metal skeletonised Super-Lumi Nova®-filled hour and minute hands and 24-hour hand. CRYSTAL Sapphire with anti-reflective coating. WATER-RESISTANCE 100 meters. STRAP Black coloured calfskin leather and ultra-resilient black synthetic fabric. BUCKLE Pin. Satin-finished and polished steel.