Seiko D409-5020 Vintage Memory Watch In Depth Review and Battery Change - YouTube
Vintage Seiko Sign Table Memory Databank Data Bank LCD Digital Watch D409-5009 | WatchCharts
Vintage Seiko Sign Table Digital Memory Watch SILVER D409-5009 Works! Very Clean | eBay
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
Seiko Vintage Sign Table Memo Data bank - ultra rare - 1983 for $761 for sale from a Private Seller on Chrono24
SEIKO - D409-5030 AO. - Digital - Vintage Digital Watch - Digital-Watch.com
Which Watch Today...: Seiko D409 Sign Table
Seiko D409-5010 Databank Digital Watch | eBay
Seiko Sign Table for $206 for sale from a Seller on Chrono24