HP-66

The HP-66 was upscaled to become the HP 9815. The tape cartridge used in the HP-66/9815 was designed and developed by HP and manufactured by 3M. This beautiful model was crafted from wood in the same fashion of the HP-56. Notice the simulated plastic seams and the detail in the paper advance, ventilation slots and slide switch indicator dots. The printout shown on the model is probably not an accurate representation of the HP-66 programming language.