Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS
UC2000] 1984 Seiko computer watch, the first ever released I believe. Comes with a keyboard to plug it in to (which is don't have unfortunately) : r/ Seiko
Seiko uc-2002 (1985) - Seiko - LastDodo
Before smartwatches broke mainstream: list of vintage wrist computers | CyberNews
Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS
[Seiko] UC-2000 Computer watch. Watch out Apple… : r/Watches
Keyboard for Seiko UC-2000 - Apps on Google Play
NEW RARE NOS Vintage 1982 Seiko UC-2000 LCD Digital BASIC Computer watch | eBay
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Seiko UC-2000 Price Guide & Market Data | WatchCharts