Grand Seiko Mechanical Hi-Beat GMT SBGJ017 Casio G-Shock Mudmaster Twin Sensor GG1000-1A Movement: H-10

Movement: H-10

◆ Sapphire crystal transparent case back

Small seconds sub-dial at 9 o'clock

Mechanical-automatic Swiss Valjoux movement (ETA 77

99 Minute Countdown Timer

Grand Seiko Mechanical Hi-Beat GMT SBGJ017 Casio G-Shock Mudmaster Twin Sensor GG1000-1A Movement: H-10Grand Seiko Mechanical Hi Beat GMT SBGJ017 Caliber 9S86 HI BEAT 36,000 Automatic GMT (hand winding capability) Power Reserve: approx 55 hours 36,000 VPH Accuracy: 3 to +5 seconds per day (under static conditions) GMT hand Box shaped sapphire crystal with inside anti reflective coating See through caseback Stainless steel case and tri fold clasp and push button release 30M water resistant Case diameter: 39. 5mm Crocodile strap