Casio F-91W-1

Meet the undisputed "Best Seller" of the digital watch world: the Casio F-91W-1. Known globally as the ultimate "no-nonsense" timepiece, it has achieved legendary status for its incredible durability, simplicity, and iconic 1980s design. Whether you’re a student, an outdoor enthusiast, or a watch collector, the F-91W is the gold standard for "lightweight" functional gear.

At just 21 g, it provides a "barely-there" feel on the wrist, yet it is famous for surviving conditions that would break much more expensive watches. With a 7-year battery life and a suite of essential digital tools, it is the definition of "always at the ready."

Key Features

• The Ultimate "Everyday" Watch: A minimalist, low-profile design that fits comfortably under shirt cuffs and withstands the rigors of daily wear.
• 7-Year Battery Life: Equipped with an ultra-efficient module that provides nearly a decade of reliable timekeeping on a single CR2016 battery.
• Featherlight Resin Build: Weighing only 21 g, it is one of the most comfortable watches in existence, perfect for 24/7 wear and active lifestyles.
• Essential Digital Toolkit: Includes a 1/100-second stopwatch (with split times), a daily alarm, and an hourly time signal to keep your schedule perfectly calibrated.
• Micro-Light Illumination: Features a built-in side LED that makes the time "easy to see in darkness" with a quick press of a button.
• Water Resistant Durability: Rated for daily water resistance, protecting the watch from rain, sweat, and accidental splashes.
• Auto-Calendar: Features a pre-programmed calendar (set at 28 days for February) so you always have the correct date and day at a glance.

Specifications at a Glance

• Case Size: 38.2 × 35.2 × 8.5 mm (The classic compact profile)
• Weight: 21 g
• Accuracy: Reliable quartz timing at ±30 seconds per month.
• Band Fit: Compatible with wrist sizes from 145 to 200 mm.
• Glass: Durable Resin Glass.