HEWLETT-PACKARD HP-01 IN ORIGINAL BOX-VINTAGE

An amazing Hewlett-Packard HP-01 Yellow gold digital electronic wristwatch with calculator, alarm clock, stopwatch, timer and calendar.

Reference: HP-01
Model: HP
Material: 14K yellow gold bezel, screw-down back
Movement: Quartz movement with three batteries and six chips
Bracelet: Gold plate. Full original links 190 mm
Clasp/Buckle: Folding clasp
Display: LED display, integrated keyboard
Signature: Case and dial signed
Diameter: 40.5 x 45 mm
Circa: 1977
Accessories: Original box, undated certificate of origin, instruction manual, adjustment key, and the original pen.
Condition: Well preserved
Specificity: Vintage collector

ID SWT: 77026001

Notes: 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. 

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 depressed with a stylus that is stored in the band. 

The production was stopped by the end of 1979.

The HP-01 is unique not only as the only Hewlett-Packard watch but due to these unique features:

* Datatype for time, date, and time interval, and the ability to perform mathematics on these datatypes.