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G-Shock GR-B100 Gravitymaster with Bluetooth & Tough Solar

G-SHOCK GR-B100 GRAVITYMASTER GR-B100-1A2 GR-B100-1A3 GR-B100-1A4 Bluetooth and Tough Solar

Another Baselworld 2018 introduction is the G-Shock GR-B100 Gravitymaster series. The GR-B100 is a Tough Solar analog-digital aviation model featuring a full-dot STN LCD display and a symmetrical face with large analog hands. The analog subdial appears to be a countdown timer and function indicator. The GR-B100 can connect to a smartphone via Bluetooth and the G-Shock Connected app can adjust the watch settings and automatically sync the time. This watch also has the flight log function which records time and location point information and presents the log data on a map in the smartphone app. A special countdown alarm feature allows the time, date, and schedule name to be set, with the remaining time to set time shown in the LCD display. This feature allows for counting down to a specified date and time, and the countdown to each event can be displayed on the watch to the exact second.

Features include shock resistance, 200-meter water resistance, Tough Solar, Bluetooth, world time, 1/1000 second stopwatch, 1/10 second countdown timer (24 hours), 5 multifunction alarms (countdown with date), and Super Illuminator LED light with afterglow. The GR-B100 measures 62.5 x 53.8 x 17.3 mm and weighs about 87 grams.

The debut models are the GR-B100-1A2 (left), GR-B100-1A3 (middle), and GR-B100-1A4 (right) featuring dual-layer resin bands.

Update: The GR-B100-1A2JF, GR-B100-1A3JF. and GR-B100-1A4JF are July 2018 releases in Japan with a list price of ¥40,000 JPY each. All three models are also scheduled for a wider Asia release in July.

Update 2: Casio America announced the availability of the GRB100-1A2 (black and blue band), GRB100-1A3 (black and green band), and GRB100-1A4 (black and orange band) on 17 July 2018 with a list price of $300 USD each.

G-Shock GR-B100-1A2 Gravitymaster

Black and blue, blue inner band, reverse LCD display.

G-Shock GR-B100-1A2 Gravitymaster

GRB100-1A2 on Amazon GRB100-1A2 at Reeds GR-B100-1A2 on eBay

G-Shock GR-B100-1A2 Gravitymaster

G-Shock GR-B100-1A3 Gravitymaster

Black and gray with green accents, green inner band, standard LCD display.

G-Shock GR-B100-1A3 Gravitymaster

GRB100-1A3 on Amazon GR-B100-1A3 on eBay

G-Shock GR-B100-1A3 Gravitymaster

G-Shock GR-B100-1A4 Gravitymaster

Black and bronze with orange accents, orange inner band, reverse LCD display.

G-Shock GR-B100-1A4 Gravitymaster

GRB100-1A4 on Amazon GR-B100-1A4 on eBay

G-Shock GR-B100-1A4 Gravitymaster

G-Shock GR-B100 Gravitymaster Promotional Video:

G-Shock Gravitymaster GR-B100

G-SHOCK GR-B100 GRAVITYMASTER GR-B100-1A2 GR-B100-1A3 GR-B100-1A4 with Bluetooth and Tough Solar

G-Shock Gravitymaster GR-B100 with Bluetooth and Tough Solar

G-Shock GR-B100 Gravitymaster Promotional Video:

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Robert Crawford
Robert Crawford
3 years ago

A fantastic watch. As soon as I saw this watch I got one. Yes, there are things I would like different in the software; but it has become my favorite work watch.

For those worried about the size, due to the angles of the lugs and the, for a G-Shock, thin build, it wears small.

TheD
TheD
2 years ago

Just ordered mine great to hear you are happy with it.

Stevenson
Stevenson
2 years ago

I recently bought one of GR B100, it’s one of the best timepiece. Real tough and tested through TIME.