Smart watches will get you killed at night. Al-Qaeda used the Casio F-91W - which is cheap, extremely common, weighs nothing, is water resistant, has a button for the screen light, doesn't
VTG Casio Thailand F-91W Men WR Black Digital Alarm Chrono Quartz Watch~New Batt | eBay
Amazon.com: Casio F91W-1 Classic Resin Strap Digital Sport Watch : Clothing, Shoes & Jewelry
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Why I Love This £10 Watch | WatchGecko
Watch LED Backlight Mod : 9 Steps (with Pictures) - Instructables
Casio F-91 User Manual / Module 593
Casio F91W-1/LA11WB-1 Men's and Women's Resin Band Alarm Chronograph Digital Watch Set - Walmart.com