The Casio F-91WM-1B is a clean, all-black take on one of the most iconic digital watches ever produced. Built on the legendary F-91 platform, this version keeps everything people love—simplicity, reliability, and lightweight comfort—while adding a slightly more modern, understated look with its dark, minimal finish.
Ultra-slim and incredibly lightweight, it’s designed for effortless everyday wear. The resin case and strap make it durable enough for daily use while remaining so comfortable you’ll forget you’re even wearing it. Whether you’re heading out casually or just need a dependable daily watch, this one fits right in.
Functionally, it delivers the essentials without overcomplication: a 1/100-second stopwatch, daily alarm, hourly time signal, auto-calendar, and LED backlight for visibility in low light.
Powered by a long-lasting battery with up to 7 years of life, and offering reliable quartz accuracy, it’s built to keep going with minimal maintenance.
Part of the globally recognized F-91 family—first introduced in 1989 and still one of the most widely worn watches in the world —this model proves that great design doesn’t need to change.
