Seiko RC-1000 data manager | World of SAM
NEW RARE NOS Vintage 1983 Seiko RC-1000 Computer Terminal LCD Digital watch | eBay
VintageDigitalWatches - Ep 18 - Epson RC-20 - YouTube
The nerdiest wristwatches of all time - by Bryan Lunduke
REQUEST CASIO RC-4000 watch face - Round Custom Faces - Full Android Watch
ASCII.jp：最初のスマートウォッチ EPSON RC-20！
The history of the smart watch, part 2 – storage, programmability, multimedia, and communication – bhtooefr.org
The History of the Smartwatch Goes Back Much Further Than You'd Think
Seiko Computer Watch Fun | Vintage Electronics Have Soul – The Pocket Calculator Show Website
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
Seiko RC-4500 Data Bank Wrist Mac Watch WristMac Retro Vintage Computer | WatchCharts
T-Rex game on Epson RC-20 (1984) - YouTube
SEIKO - BACK TO THE FUTURE - QUARTZ S111-5009 STOPWATCH | eBay
Seiko Computer Watch Fun | Vintage Electronics Have Soul – The Pocket Calculator Show Website
Before smartwatches broke mainstream: list of vintage wrist computers | CyberNews
Seiko RC-1000 Wrist Terminal Complete Set | eBay
Epson RC-20 (1984) | レトロな広告, レトロなスタイル, 昔の広告
Seiko world timer | eBay
Benj Edwards on Twitter: "Epson RC-20 (1985), first true smartwatch; could run standalone apps loaded from ROM and display them on its LCD http://t.co/6yNO3WupcX" / Twitter
Rewind the 80's-90's — Epson RC-20 (1984)
ASCII.jp：最初のスマートウォッチ EPSON RC-20！
EPSON RC-20 腕コン seiko uc-2000 デジボーグ ジウジアーロ(セイコー)｜売買されたオークション情報、ヤフオク! の商品情報をアーカイブ公開 - オークファン（aucfan.com）
The origin of 'wearable computer' was in Japan in the 1980's - GIGAZINE
