Seiko UC-2000 The "origin" of smartwatch - YouTube
Your favorite — The Seiko UC-2000 was one of the first "smart...
File:Seiko Data-2000, The First Computer Watch, Circa 1983-1984, LCD Watch with Docking Station (8515983575).jpg - Wikipedia
Computer ♥ Records on X: "The Original Smartwatch? Seiko RC-1000 aka Wrist Terminal from 1984 could connect to your desktop computer like a Commodore 64, IBM, Apple IIe, or BBC Micro. #technology
Seiko Origins: The Story of the First-Ever Smart Watch - seikomods.com