USED SEIKO D409-5000 SING TABLE MEMO ALARM DIGITAL WATCH FOR PARTS & REAPERS | eBay
Vintage 1980s Seiko Sign Table D409-5009 Memory Digital LCD Men's Watch Working | WatchCharts
FS: Vintage Digital Seiko's - "Pan AM" M158-5000 and "Sign Table" D409-5009 | WatchUSeek Watch Forums
DWF - The Digital Watch Forum • View topic - Seiko D409-5000 (time table) 1986
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