![GST-B400D-1AER | Casio G-Shock G-Steel GSTB400D1AER watch, oficial catalog, Laguardajoiers official distributor of Casio in Barcelona GST-B400D-1AER | Casio G-Shock G-Steel GSTB400D1AER watch, oficial catalog, Laguardajoiers official distributor of Casio in Barcelona](https://www.laguardajoiers.com/media/catalog/product/cache/84c6d0901a43e0f971586c963d22e9d6/g/s/gst-b400d-1aer_web_1.jpg)
GST-B400D-1AER | Casio G-Shock G-Steel GSTB400D1AER watch, oficial catalog, Laguardajoiers official distributor of Casio in Barcelona
![The Slimmest G-Shock Yet: Introducing the G-Steel GSTB400-1A | WatchTime - USA's No.1 Watch Magazine The Slimmest G-Shock Yet: Introducing the G-Steel GSTB400-1A | WatchTime - USA's No.1 Watch Magazine](https://www.watchtime.com/wp-content/uploads/2021/05/GSTB400-1_3000x3000-scaled.jpg)
The Slimmest G-Shock Yet: Introducing the G-Steel GSTB400-1A | WatchTime - USA's No.1 Watch Magazine
![Casio G-Shock G-Steel 'Tough Chronograph' GST-B100 Series Bluetooth Connected Watches | aBlogtoWatch Casio G-Shock G-Steel 'Tough Chronograph' GST-B100 Series Bluetooth Connected Watches | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/09/Casio-G-Shock-G-Steel-GSTB100D-1A-Bluetooth-Connected-1.jpg)
Casio G-Shock G-Steel 'Tough Chronograph' GST-B100 Series Bluetooth Connected Watches | aBlogtoWatch
![My Casio GST B300! Absolutely love this watch. But feels a bit thick sometimes 😬. saving up to get the GST B-400 which I guess is way thinner than this model! : My Casio GST B300! Absolutely love this watch. But feels a bit thick sometimes 😬. saving up to get the GST B-400 which I guess is way thinner than this model! :](https://preview.redd.it/2fel890csbs81.jpg?width=640&crop=smart&auto=webp&s=90c729fe0bc24aa09538c5e17f78b1dceb550c10)