G-Shock Introduces the “Extra-Thin” GA-2100 Carbon Core Guard

Lightweight and wearable.

The new G-Shock GA-2100 is likely the most wearable in the line-up, being the thinnest G-Shock ever. Its compact dimensions – and analogue hands – gives it the feel of a conventional watch, avoiding the extremely oversized style of many G-Shocks.

Just 11.8mm high, the GA-2100 is thinner than the Omega Speedmaster Moon Watch (13mm) and the Rolex Daytona (12.2mm). The case diameter is 45.4mm, though it looks and feels substantially smaller.

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G-Shock inventor Kikuo Ibe at the launch of the GA-2100 in Singapore

Though reduced in size, the GA-2100 has the traditional G-Shock case construction that includes an inner protective bumper around the electronic module.

Visible around the steel case back, the bumper is made of carbon composite – which Casio has named the Carbon Core Guard – which is a dark marbled grey and distinct from the black resin outer case.

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The octagonal bezel is immediately reminiscent of the Royal Oak, but according to Casio it is actually a reworking of the bezel of the original G-Shock of 1983, the DW-5000C, which was octagonal, albeit one with unequal sides.

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The GA-2100 has an analogue displays for the time and day of the week, but also all the usual electronic functions of a G-Shock in two LCD windows, including multiple time zones, stopwatch, alarm, countdown and calendar.