In the quiet calculus of consumer desire, Casio's modest step-tracking watch — a £55 descendant of the iconic F-91W — sold out across Japan and the UK within days of its debut, leaving only a teal variant behind. The F-B100W-1A offers Bluetooth connectivity and a motion sensor in a familiar shell, yet its disappearance from shelves raises the older question of whether scarcity reflects genuine demand or simply the arithmetic of cautious production. Casio has said nothing about restocking, and the American market has yet to receive so much as a price.
Casio's Bluetooth F-B100W-1A Sells Out in UK Week After Launch
The watch vanished within seven days of going on sale
Mark
Why did this watch sell out so quickly in two different markets?
Mimi
The motion sensor and Bluetooth connectivity are genuinely new for Casio's classic digital watch form. People who've worn the F-91W for years suddenly have a reason to upgrade—step tracking, app integration, automatic time setting. That's enough to move inventory fast.
Mark
But is it actually scarce, or did Casio just make very few?
Mimi
That's the real question. Japan cleared its entire launch allocation in one day. The UK took a week. Both sold out on Casio's official store. That pattern suggests either real demand or deliberately small batches. Casio hasn't said which.
Mark
The price difference between regions is striking—22 percent higher in the UK even after tax.
Mimi
It is. But it's not unusual for Casio. The F-91W itself costs more in Britain. What's interesting is whether the Bluetooth version will stay that expensive if it comes back, or if the premium was partly artificial scarcity pricing.
Mark
Will people actually use the step tracking, or is it just a novelty?
Mimi
That depends on the person. For someone who already checks their phone for activity data, it's redundant. For someone who wants a watch that does one thing well without needing to carry another device, it's useful. The daily goal graph and inactivity alerts are practical features, not gimmicks.
Mark
What happens next?
Mimi
Casio either restocks or doesn't. If they do, we'll see whether demand stays this high or if the initial surge was just early adopters. If they don't, the teal variant becomes the only option, and the black watch becomes a collector's item.
El Pulso
- A watch priced at £55 — barely more than a dinner out — emptied Casio's UK inventory in seven days, echoing a same-day sellout in Japan weeks earlier.
- The shortage is surgical: only Casio's own storefront ran dry, while third-party retailers remained untouched, suggesting the company's direct supply was simply too thin.
- No restock announcement has come, and a third variant — the negative-display F-B100W-1B — never appeared on the UK site at all, deepening the sense of an incomplete launch.
- The teal F-B100W-3A holds the line at £55, the sole remaining option for buyers drawn to step tracking, 300 world time zones, and two years of battery life in a 26-gram case.
- With no US pricing announced and demand clearly outpacing supply, the watch's next chapter depends entirely on decisions Casio has not yet chosen to share.
In the quiet calculus of consumer desire, Casio's modest step-tracking watch — a £55 descendant of the iconic F-91W — sold out across Japan and the UK within days of its debut, leaving only a teal variant behind. The F-B100W-1A offers Bluetooth connectivity and a motion sensor in a familiar shell, yet its disappearance from shelves raises the older question of whether scarcity reflects genuine demand or simply the arithmetic of cautious production. Casio has said nothing about restocking, and the American market has yet to receive so much as a price.
Casio's black F-B100W-1A disappeared from its UK store within a week of launching on August 17th at £55 — a pattern that had already played out in Japan, where the entire first allocation sold through on the day it went on sale, August 7th. Only the teal F-B100W-3A remains available at the same price. Casio has offered no word on restocking, and a third variant with a negative display never appeared on the UK site at all. Third-party retailers were unaffected throughout.
The pricing carries its own quiet tension. Japan's launch price of ¥8,800 converts to roughly $55 after the country's 10% tax; Britain's £55, after 20% VAT, works out to about $74 — a gap of approximately 22%. For context, Casio's non-connected F-91W sells for around £20 in the UK. What the premium buys is a motion sensor capable of tracking up to 999,999 steps, a six-level daily progress graph, adjustable step goals, inactivity alerts, and Bluetooth pairing with Casio's app for time sync and activity logging across some 300 world time zones.
The watch shares the F-91W's compact proportions — 41.9 by 38.1 by 8.8 millimeters, 26 grams — and adds an LED backlight, stopwatch, countdown timer, and five alarms. Its CR2016 battery is rated for about two years, a notable drop from the seven years Casio claims for the standard model. No US pricing has been announced, and whether the sellout reflects deep demand or simply a shallow initial run remains an open question Casio has yet to answer.
Casio's black F-B100W-1A smartwatch vanished from the company's UK store shelves within seven days of going on sale. The watch launched on August 17th at £55, and by late August, it was gone—a repeat of what happened in Japan, where the entire initial allocation sold through on the very day it became available, August 7th.
What remains is the teal variant, the F-B100W-3A, still priced at £55 on Casio's official site. But the black model, at least for now, is nowhere to be found there. Casio has offered no word on whether it will restock. The shortage applies only to Casio's own store; third-party retailers were never affected. There's also a third version with a negative display, the F-B100W-1B, that never appeared on the UK site at all.
The pricing tells an interesting story about regional economics. In Japan, the watch launched at ¥8,800, which converts to roughly $55 at current exchange rates. In Britain, it costs £55, which works out to about $74. Both prices include local tax—10 percent in Japan, 20 percent in the UK. Even after accounting for that difference, the British price sits roughly 22 percent higher than the Japanese one. For comparison, Casio's standard F-91W, a non-connected digital watch, sells for about £20 in the UK and $25 on Amazon.
That premium buys something concrete: a motion sensor. The F-B100W tracks steps up to 999,999, displays progress against a daily goal using a six-level graph, lets users set targets anywhere from 1,000 to 50,000 steps per day, and can alert the wearer after extended periods of sitting still. Bluetooth connectivity pairs the watch with Casio's Watches app, which handles automatic time synchronization, access to roughly 300 world time zones, and activity logging.
The watch itself is compact—41.9 by 38.1 by 8.8 millimeters, weighing just 26 grams—with the same proportions as the F-91W. It includes an LED backlight, a stopwatch, a countdown timer, and five daily alarms. The CR2016 battery is rated for approximately two years of use, a significant step down from the seven-year lifespan Casio claims for the standard F-91W.
As of now, no US pricing has been announced. The rapid sellout in both Japan and the UK suggests demand outpaced supply, but whether that reflects genuine scarcity or simply limited initial production remains unclear. Casio has not committed to bringing the black model back.
Citas Notables
Casio has not said whether the reference will return— Casio (via lack of official statement)
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