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Ricoh Ricomac 2420 Desktop Calculator

Image Courtesy Takaharu Yoshida

The Ricoh Ricomac 2420 is an OEM version of the Panasonic (Matsushita) Panac-12W calculator. Ricoh did not make their own electronic calculators, but instead relied on OEM relationships with existing calculator manufacturers to use market the manufacturer's calculators (with styling and color scheme differences) under the Ricoh brand name.

The Ricomac 2420 is a basic four function office calculator, with 12 digit capacity, and a single memory register. The machine utilizes small scale integrated circuit technology, as well as a magnetostrictive delay line for working register storage. It was introduced in early 1970.
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