HP-01

The Hewlett-Packard HP-01 is a calculator watch. It was designed and manufactured by Hewlett-Packard (HP). The HP-01 used 7 light-emitting diodes (LEDs)/digit in a 7 digit + decimal point arrangement for its digital display. Introduced in 1977 at the height of the LED watch craze, five models were available, two gold filled models and three stainless models. Prices were from $450 & $550 for the low end steel or gold to $850 (the equivalent of $2,500 to $3,300 in 2014 dollars). HP also sold a battery replacement kit that allowed the customers to change the batteries themselves. The watch uses two batteries for the display and one for the processor IC. It also comes with a ball-point pen with a stylus on the rear end. Most of the 28 buttons on the HP-01 are recessed, and are designed to be d

HP-01

The Hewlett-Packard HP-01 is a calculator watch. It was designed and manufactured by Hewlett-Packard (HP). The HP-01 used 7 light-emitting diodes (LEDs)/digit in a 7 digit + decimal point arrangement for its digital display. Introduced in 1977 at the height of the LED watch craze, five models were available, two gold filled models and three stainless models. Prices were from $450 & $550 for the low end steel or gold to $850 (the equivalent of $2,500 to $3,300 in 2014 dollars). HP also sold a battery replacement kit that allowed the customers to change the batteries themselves. The watch uses two batteries for the display and one for the processor IC. It also comes with a ball-point pen with a stylus on the rear end. Most of the 28 buttons on the HP-01 are recessed, and are designed to be d