G-Shock with 45X45 MM Two-Tone Round Dial Resin Band Strap. GMAS140M-1AG-Shock® is the toughest watch in the world. It sprung from the concept of creating a tough watch that will not break even when dropped. The first G-Shock was launched in 1983. The square design with its symbolic importance was created in pursuit of shock resistance alone with nothing wasted. The ultimate form for achieving this single function it has been handed down to the present as an eternal standard.