CASIO AQ-321 genuine vintage 1980s marlin Retro Analog / Digital Watch St. steel | WatchCharts
Vintage Casio AQ-321 Analog Digital Quartz Watch Module 309 - Etsy
SAT CASIO AQ-321 ANA/DIGI-JAPAN
Vintage Casio AQ-321 Module 309 ANALOG & Digital Chronograph Watch JAPAN M CLOCK | eBay
Can't figure out how to remove the scratches from the crystal of my Casio AQ -321. I've tried extensive sessions using both Polywatch Plastic & Polywatch Glass products. Nothing works. Please help. :