Super Rare Casio F-15 Blue/Red model 1988, the brother to the white model, equally as rare, this is 1 of only two I've ever seen and is used but in great condition. :
Casio | Accessories | Casio Digital Watch Men Black 35mm Alarm Chronograph 572 F15 Timer A1 | Poshmark
Casio F-15 White model 1988 again a super rare Casio all original only ever seen 2 others for sale in the last 2 years, they command big money now! : r/ casio
Casio Illuminator Digital Watch Men Black Dual Time Alarm NEW BATTERY | eBay