RetroTech: Hewlett Packard HP-01 1977's Smartest Watch

HP only made one calculator watch and almost 40 years later it continues to be an amazing, uniquely capable device. Useful Links Below: HP01 watches regularly come up on ebay here: WATCH&icep_sellerId=&icep_ex_kw=&icep_sortBy=12&icep_catId=&icep_minPrice=&icep_maxPrice=&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg LED Museum (The ultimate HP01 resource) HP Museum HP's own Journal PDF Dedicated to the HP-01 Hodinkee (these are the chaps who suggested it was the first smartwatch - if you disagree, please argue it out with 'm merely passing on the info)