Saturday watch illustration, this one with what in my opinion is probably the first concept of a smartwatch in the '80s: the Seiko UC-2000! This piece would work as a simple digital
Seiko UC-2100 keyboard datagraph | National Museum of American History
Retro: Seiko UC2000 Series Wrist Information System – TechBeach
Seiko Wrist Computer UC-2000 UC-2100 Keyboard Digital Working Mans Watch Vintage | eBay
European Society for Computer Preservation - The Seiko UC-2100 Keyboard module, with docking area for the wrist watch module, manual, and original package. | Facebook