Seiko RC Family Review - Ep 64 - Vintage Digital Watches - YouTube
My grandfather's Seiko RC-4000 watch from 1985. The "most advanced, hight tech" watch for its time that connected to the Apple II computer. : r/BuyItForLife
Nos 1985 Seiko Rc 4000 Watch For Sale in Ballybrittas, Laois from TimeMrWolf
RC-4000/4400
RARE VINTAGE 1980's SEIKO RC-4000 DATAGRAPH COMPUTER WATCH. | in Pinner, London | Gumtree