Seiko Prospex Automatic SRP779 Casio G-Shock Bluetooth Gravity Master GRB-100-1A2 (measurement range: -10 to 60

(measurement range: -10 to 60 °C (14 °F to 140 °F)

comes to the GA100 model lineup

and is water resistant up to 200 meters

The main highlight of its design is the face’s bi-compax layout

even during use without a phone connection

Seiko Prospex Automatic SRP779 Casio G-Shock Bluetooth Gravity Master GRB-100-1A2 (measurement range: -10 to 60Seiko Prospex Automatic SRP779 DRIVING SYSTEM Automatic with manual winding mechanism CALIBER NO. 4R36 CASE Stainless Steel GLASS MATERIAL Hardlex Glass WATER RESISTANCE 200m Diver CASE DIAMETER 45. 0mm FEATURES Screw case back Screw down crown Magnetic resistance: 4,800 A m High legibility The dial design has just one objective; maximum legibility, even deep in the ocean where sunlight does not penetrate. The hour markers are large, so as to allow