(Affiliate Notice: G-Central may earn a commission on sales made from its links to Amazon, eBay, and Reeds.)

Blackout Mudmaster GGB100-1B and Rangeman GW9400-1B U.S. Release

Blackout G-Shock Mudmaster GGB100-1B and Rangeman GW9400-1B

Casio announced the G-Shock Mudmaster GGB100-1B (left) and Rangeman GW9400-1B “Blackout” Editions for a February 2020 release. These basic black models feature a mostly black colorway with silver buttons, gray lettering, beige accents, and reverse LCD displays. These watches continue the style that was originally seen with the Mudmaster GWG-1000-1A1 in 2018.

Except for its standard resin band instead of a carbon fiber insert band, the GW9400-1B is the same as Japan’s GW-9400J-1BJF released in January 2020.

The Mudmaster GGB100-1B utilizes the Carbon Core Guard structure with a carbon fiber reinforced case and also comes equipped with a carbon fiber bezel. Major features include mud resistance, Quad Sensor (with altimeter-barometer, compass, thermometer, and step tracker), sunsrise/sunset data, and Bluetooth mobile link.

Major features of the Rangeman GW9400-1B include mud resistance, low temperature resistance (-10C/14F), Tough Solar power, Multi-Band 6 auto radio timekeeping, Triple Sensor, sunrise/sunset data, one-press stopwatch start button, and 40-set sensor record memory. Of course, both models are also shock-resistant and water-resistant to 200 meters.

Though both watches are slated for a late February 2020 release, one dealer is already selling the GW9400-1B on Amazon and eBay (see below). The GGB100-1B and GW9400-1B will also be available at Gshock.com for $380 and $330, respectively.

The GG-B100-1BER and GW-9400-1BER are also being released in Europe.

G-Shock Mudmaster GGB100-1B

Blackout G-Shock Mudmaster GGB100-1B

GGB100-1B on Amazon GGB100-1B at Reeds GGB100-1B on eBay

Rangeman GW9400-1B

Blackout G-Shock Rangeman GW9400-1B

GW9400-1B on Amazon GW9400-1B at Reeds GW9400-1B on eBay

Share This Post
(Disclosure: G-Central is independently managed by fans and is not an official G-Shock site. For official G-Shock support, visit world.casio.com. As an Amazon Associate, eBay Partner, and Reeds Jewelers affiliate, G-Central earns on qualifying purchases, at no additional cost to the customer. )

Shop for new releases and see our top picks at: amazon.com/shop/gcentralhq


  1. G-Central JP
    • G-Central G-Central
  2. G-Central Ronald F.D. Beintema
  3. G-Central Mark
    • G-Central G-Central

Leave a Reply to Ronald F.D. Beintema Cancel reply