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Omron 1200 Desktop Calculator

Image Courtesy Takaharu Yoshida

Omron's second electronic calculator, introduced in Japan in January, 1970. The 1200 is the little brother of the earlier Omron 1210, taking away the 1210's memory functionality. The 1200 utilizes two large-scale integration (LSI) devices that make up the vast majority of the logic of the calculator. The LSI ICs are packaged in an unusual fasion, with large OMRON labeling either printed or embossed into the packaging. At this time, it is unclear who manufactured the LSI chips for Omron. When the calculator was developed (1967-1969), Japanese semiconductor manufacturers did not yet have volume production LSI fabrication technology perfected, so these IC's had to be made either in the US or Europe, under contract to Omron. If anyone out there has any information on the the integrated circuits used in the Omron 1200 and Omron 1210 calculators, please contact us by clicking the EMail button at the top of this page.

The Omron 1200 is a four function calculator with twelve digit capacity using unique segmented Vacuum Flourescent display tubes that create a hand-written appearing digit rendition, similar to the Itron tubes used on some Sharp calculators from the early 1970's, but without the odd half-sized zeroes. Fixed decimal setting via slide switch at left side of keyboard. Flip-up display cover becomes a shroud to allow easier reading of display in high ambient light conditions.

The Omron 1200 may be branded by other companies, as Omron was keen on selling their calculators to other distributors who would put their name on the machines and market/sell/support the calculators through their own distribution and service networks. The Old Calculator Museum is interested in acquiring any brand variant of this calculator.