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RARE VINTAGE SEIKO D409-5000 MEMORY DATA BANK DIGITAL LCD MEN'S WRISTWATCH WORKS | WatchCharts
Seiko D409-5000 Rare Digital Memory Watch Quartz Mens Watch Authentic Working | eBay
USED SEIKO D409-5000 SING TABLE MEMO ALARM DIGITAL WATCH FOR PARTS & REAPERS | eBay
FS: Vintage Digital Seiko's - "Pan AM" M158-5000 and "Sign Table" D409-5009 | WatchUSeek Watch Forums
Benj Edwards on Twitter: "Seiko D409 (1983), the first mass-produced databank watch, could store 112 chars in memory. Users typed via stylus. http://t.co/x1N7qyikjh" / Twitter