Seiko UC-2000 The "origin" of smartwatch - YouTube
File:Seiko Data-2000, The First Computer Watch, Circa 1983-1984, LCD Watch with Docking Station (8515983575).jpg - Wikimedia Commons
Seiko Quartz Diving Computer Digital Men's Watch STN009J1 – Chronobuy
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
Seiko Wrist Computer UC-2000 UC-2100 Keyboard Digital Working Mans Watch Vintage | eBay
SEIKO WATCH | Our Heritage
SEIKO WATCH | The Seiko Museum - Driving Digital Timepiece Development
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
Before Smartwatches, There was the Seiko UC-2000 Wrist Computer, Here are 5 Cool Facts - TechEBlog
Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS
Seiko Computer Watch Fun | Vintage Electronics Have Soul – The Pocket Calculator Show Website
Before Smartwatches, There was the Seiko UC-2000 Wrist Computer, Here are 5 Cool Facts - TechEBlog
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
SEIKO UC-2000 / 2100 With Keyboard Fantastic NOS Rare | eBay