Rubber strap for Casio PRG-80 PRW-1000 PRW-1100 PAG-80 multi-series available watch accessories - AliExpress
Early 80s W-36 Marlin. Had this one a little while, just got around to cleaning and putting a new battery in. In far nicer condition than the $5 it owes me. :
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Casio Calculator Watches Are Pre-Apple 1980s Icons Still On Sale Today - Bloomberg
Casio Desktop Calculator with 8-Digit Display, Tax, Currency, (MS-80S-S-IH)
CASIO STANDARD AW-80-1AV - UNBOXING - YouTube
Casio W-500 Stopwatch Watch Module 211 - Etsy
Casio Calculator Watches Are Pre-Apple 1980s Icons Still On Sale Today - Bloomberg
Vintage very rare 80s Casio W-300 Marlin module 106 men's quartz digital wristw | WatchCharts