Casio Mudmaster watches

The Casio G-Shock Mudmaster is part of Master of G, the specialist G-Shock line Casio used to introduce features that later reached its standard models; the same line includes the Frogman, Rangeman and Gulfmaster. Its name goes back to mud resistance. In 1985 the DW-5500C became the first G-Shock with a mud-resistant structure, and collectors nicknamed it Mudman. Casio followed in 1995 with a mud-resistant line that took the Mudman name, and Mudmaster is the name Casio gives to the analogue-display branch of that family.

These are big analogue-digital watches in a case of resin and stainless steel, all with black dials. The GWG-1000 Mudmaster Triple Sensor measures 56.1 mm across and 18 mm thick and sits under a sapphire crystal. The GG-1000 Twin Sensor is a little smaller, at 55.3 mm and 17.1 mm, and uses a mineral crystal instead of sapphire.

Both come in several colourways. The all-black GWG-1000-1A is joined by the GWG-1000-1A9 with yellow, the GWG-1000RD-4A with red and the black-and-gold GWG-1000GB-1A. The Twin Sensor follows the same idea: the black GG-1000-1A, the GG-1000-1A3 with green, the GG-1000-1A5 with beige and the black-and-gold GG-1000GB-1A.