The watch premiered in all black, all red and black and grey and has since diversified into pinks, yellows, greens and earthier tones – all with interchangeable bands. It was created by Casio engineer Kikuo Ibe after he accidentally dropped and broke his father’s pocket watch.

Combining the Carbon Core Guard structure, which protects the module and provides both shock resistance and a compact case, with G-SHOCK classic colours first used in the G-SHOCK 5600 models enables you to wear the latest, and the greatest G-SHOCK has to offer. For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time.

In the Flight Log memory GPS precise location with time and date, can be opened by pressing a button. This sleek black and grey piece embeds the latest carbon core guard technology in a slimmer more refined case. The aesthetic similarities between the two watches are certainly there: octagonal bezel, minimalist design and perfectly integrated bracelet.

Phone Finder: Pressing a button on the watch will emit an audible tone from your phone, even in silent mode. Many of these pieces are not so much bought as collected and G-Shock’s desirability has duly skyrocketed.

million member-strong r/Watches channel on Reddit and you’ll regularly see the GA-2100 appear alongside admiring comments.

The Casioak nickname springs from the GA-2100’s resemblance to the Audemars Piguet Royal Oak, both in terms of looks and, now, unavailability. With a push of a button, hands are moving and permit a free visibility of functions like stopwatch or date. But in the shared territory between streetwear and timepieces, one watch is very much the OG: Casio’s G-Shock. It delivers a small feature set for a G-SHOCK: analog and digital time, stopwatch, world time, perpetual calendar (good through 2099), five daily alarms and a countdown timer.What has helped make the 2100 series such a phenomenon is something else: it’s a streetwear-adjacent timepiece that the capital-W Watch community has got behind. From the birth of breakdance to the bmx ramp, g-shock has been at the heart of some of the coolest happenings of the last 35 Years. So different from the contemporary trend for thinner, lighter timepieces, it caused a stir in the international media by shattering the notion of a watch as a fragile piece of jewellery to be handled with care. What’s more, just as luxury fashion has nuzzled up to streetwear, so too are watchmakers chasing hypebeasts through savvy collabs, striking designs and, of course, limited edition production runs. Transparent watches are also gaining prominence and one of the latest 2100 models is the GA-2100SKE, with its clear resin case and bracelet.

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Don’t miss out on this eye catching piece. Running through the functions and setting the watch is straightforward – with a bit of optional theater.In recent years, as streetwear has evolved from alternative fashion to, well, fashion itself, the G-Shock line has doubled down on its position by embracing the genre’s new tropes, notably limited edition, hip hop-oriented collaborations with musicians, artists, designers et al. All three of the original GA-2100 versions have a negative liquid crystal screen with light colored letters.