Benton Harbor, Michigan, USA
Heath Company, famous for their high-quality, reasonably-priced electronic kit products, hopped onto the electronic calculator bandwagon of the early 1970's in their own unique way. By offering electronic calculator kits that could be assembled from parts in a matter of hours, Heath enabled many hobbyists for whom the dream of owning their own electronic calculator was out of reach due to the cost of these machines in the early '70's.
With Heath's kit products, hobbyists had the opportunity to 'build their own', learning how these marvels of technology operate, as well as saving money over the price of a 'fully assembled' calculator from makers like HP, Texas Instruments, Canon, or Monroe.
Source : The Old Calculator Web Museum