Casio MTG watches

The Casio G-Shock MT-G is the metal branch of G-Shock, built on a shock-resistant structure that combines stainless steel and urethane. The series began in 1999, and the name stands for Metal-Twisted. The MTG-500 of 2000 set coloured resin inside a metal case, the MTG-1000 of 2007 added radio-controlled time and solar charging, and the MTG-S1000 of 2013 introduced the Core Guard Structure.

The MTG-G1000, launched in 2015, was the first MT-G to take time from GPS satellites as well as from terrestrial radio stations. Its solar-powered GPS Hybrid Wave Ceptor system uses the GPS signal to set the time zone and daylight saving time wherever the wearer lands, and six radio transmitters in Japan, North America, Europe and China to set the time even inside buildings. Inside, a composite resin case protects the module, a metal frame ties the bezel to the case back with four stainless steel tubes, and a resin shock absorber sits between bezel and case, under the Triple G Resist label for shock, centrifugal force and vibration. The crystal is sapphire, the hands are carbon fibre, and a dual-coil motor swings the hands quickly when switching between home and local time on the sub-dial.

The G1000 references share one 54.7 mm by 16.9 mm case and a black dial; what separates them is finish. The MTG-G1000D-1A is the plain steel version, and the MTG-G1000D-1A2 adds blue to the same steel and black scheme. The MTG-G1000GB-1A, the Black / Gold, combines steel and resin. The MTG-G1000BS-1A, the Aged Gold, is limited to 500 pieces.