Seiko Originals: The UC-2000, A Smartwatch from 1984 – namokiMODS
Frederique Constant Horological Smart Watch Mens FC-282AS5B6
Amazon.com: SEIKO SNKM97 Automatic Watch for Men - Recraft Series - Stainless Steel Case and Bracelet, Green Dial, Day/Date Calendar, 50m Water Resistant, and 41 Hour Power Reserve : Clothing, Shoes & Jewelry