Historical Perspectives: Meet The Very First Smartwatch: Behold The HP-01, from Hewlett-Packard - Hodinkee
Watchismo Times: Calculating the History of LED Calculator Watches
HP-01
Compuchron Calculator Watch
1977: The HP-01 calculator watch can calculate dynamically using time as an argument. The user can watch as the cost of their international call increases on the display. : r/RetroFuturism
HP 01 - Calculator LED watch - 1977 - Catawiki
HP-01 LED Watch calculator. | The LED Watch
Hewlett Packard HP-01 LED Gold Tone Calculator Watch--WORKS! NO RESERVE! | WatchUSeek Watch Forums
Pacardt Montre HP-01 1977 - for R104 374 for sale from a Private Seller on Chrono24
Vintage 1977 Hewlett Packard HP 01 Calculator Watch. SOLD | afinewatch.com
Hewlett Packard HP 01 watch calculator
Top 5 Best Vintage Calculator Watches – Total Watch Repair