Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS
Seiko uc-2000 watch or computer? | WatchUSeek Watch Forums
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
Seiko computer watch and controller UC-2000 and UC-2100 with Box Japan Version | eBay
Seiko UC-2100 keyboard datagraph | National Museum of American History
European Society for Computer Preservation - The Seiko UC-2100 Keyboard module, with docking area for the wrist watch module, manual, and original package. | Facebook
Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS