GST-B300B-1ACR / GSTB300B-1ACR / GST-B300B-1A G-STEEL GST-B300 Series Introducing the GSTB300B-1A, the latest in the new rugged style of G-STEEL models that feature Carbon Core Guard structure. The new GSTB300s adopt tough G-SHOCK styling with a disk indicator at 6 o’clock that shows the current...