watch.at.me on Instagram: “® #watchatmereadystock . Vintage Casio DB-520 Data Bank World Time 'Rare', circa 1985 ⚡️ • good condition… | Casio, Vintage, Casio watch
Casio DB 520 - Battery replacement - battery change - and resset - YouTube
Possibly my favourite Casio, for some reason: the venerable DB-520 : r/casio
Vintage CASIO "Data Bank 50" World Time DB-520 / Digital Watch | eBay