Casio unveils "slimmest ever" G-Shock G-Steel watches

The new G-Steel GST-B400 range comes with the slimmest case yet - at 12.9mm (0.5-inches). (image credit: Casio)
The stainless steel GST-B400BD has a dark stainless steel band and bezel, plus a blue face. (image credit: Casio)
A newer version of lower power Bluetooth is used on the range, with connection to a smartphone allowing for automatic time adjustment. (image credit: Casio)
The GST-B400AD has a stainless steel band, with a black and red face. (image credit: Casio)
Casio uses its proprietary Tough Solar power system to ensure the battery life lasts up to 18 months. (image credit: Casio)
The GST-B400D has a classic stainless steel band with a black watch face. (image credit: Casio)
As with other G-Shock watches, this G-Steel series comes with shock and water resistance (up to 200m). (image credit: Casio)
The main different with the standard GST-B400 is that it swaps the stainless steel strap for a resin one. (image credit: Casio)
The 2021 Casio G-Shock G-Steel series will be available from June 2021. (image credit: Casio)