# Casio revives legendary F-91W watch with smart features

The sold-out Japan model blends nostalgia with modern functionality.

- **Source:** [Yanko Design](https://brifing.si/source/41d28791-ef47-4e0b-a40a-2a5efca0c11b)
- **Published:** 2026-08-12
- **Topic:** [Business](https://brifing.si/c/business)
- **Original article:** <https://www.yankodesign.com/2026/08/12/casio-upgrades-the-classic-f-91w-watch-with-smart-functions-and-its-already-sold-out-in-japan/?utm_source=rss&utm_medium=rss&utm_campaign=casio-upgrades-the-classic-f-91w-watch-with-smart-functions-and-its-already-sold-out-in-japan>
- **On Brifing:** https://brifing.si/s/85d35b21-2de0-4c52-80b7-5f85cc9d9e84

## Icon reborn

Casio's iconic 1980s F-91W watch returns as the F-B100W with smart capabilities. Maintaining original dimensions (41.9 × 38.1 × 8.8 mm) and weight (26g), the ¥8,800 (~$55) model sold out quickly in Japan. The design preserves nostalgic elements while introducing contemporary tech features consumers clearly desire.

## Essential upgrades

While keeping classic features like adjustable amber LED backlight and water resistance, the new model adds ventilation slits to its bio-based plastic strap for comfort. Practical improvements include 2-year battery life and five daily alarm options, balancing tradition with modern usability expectations.

## Smart connectivity

Bluetooth integration stands out as the F-B100W's headline feature, enabling automatic time syncing, dual time display, and alarm controls via smartphone. The phone finder function adds everyday practicality without overwhelming users with excessive smart features.

## Fitness tracking

Step counting and lap timing functions sync to a companion app, allowing goal setting and recording up to 200 laps. The inactivity alert system - emitting beeps and on-screen prompts - particularly benefits office workers, demonstrating Casio's focus on practical health features.

## Minimalist philosophy

Casio deliberately omitted advanced metrics like heart rate monitoring, instead prioritizing core functionality. This 'smart-enough' approach carves a unique market niche for users seeking basic connectivity without smartwatch complexity or constant charging.

## Design variants

Available in three colorways (1AJF, 1BJF, 3AJF), the watch offers black cases with retro blue/red/yellow accents or all-black designs. Positive and negative LCD display options cater to different style preferences while maintaining the F-91W's recognizable silhouette.

## Value proposition

Priced at double the original F-91W's $22 tag, the F-B100W justifies its premium with thoughtful smart features. It serves as a gateway product, introducing traditional watch users to connected functionality through familiar design language.

## Market implications

Casio's move could revitalize the basic digital watch segment. Given Gen Z's appetite for retro styles paired with essential tech, industry analysts predict similar demand spikes when the F-B100W launches globally in coming months.

## Sources covering this story

- https://www.yankodesign.com/2026/08/12/casio-upgrades-the-classic-f-91w-watch-with-smart-functions-and-its-already-sold-out-in-japan/?utm_source=rss&utm_medium=rss&utm_campaign=casio-upgrades-the-classic-f-91w-watch-with-smart-functions-and-its-already-sold-out-in-japan — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._