Pro Trek by Casio PRG270-4A G-Shock G-Steel 35th Anniversary Edition GSTB100TFB-1A with the Grand Seiko logo

with the Grand Seiko logo at the twelve o'clock position

Dive time and surface interval measurement function

Eterna Adventic GMT Manufacture Automatic Grey Dial REF: 7661

green bezel

This stylish watch

Pro Trek by Casio PRG270-4A G-Shock G-Steel 35th Anniversary Edition GSTB100TFB-1A with the Grand Seiko logoPro Trek by Casio PRG270 4A "Introducing the Solar Powered PRG270 which incorporates Casio's new Triple Sensor Version 3 engine. Advanced CASIO original technology has allowed for a 95% smaller direction sensor and 90% reduction in sensor power consumption compared to previous models. Despite their smaller size, the new sensors in this model delivers better accuracy and energy efficiency. This model can measure Altitude in 1m increments (previously