Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 131,418 pages of information and 208,872 images on early companies, their products and the people who designed and built them.

Tektronix

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June 1955. Oscilloscopes Type 545 and 541.
1975.
1975.
1975.
1976. Telequipment S22.
1976.
1983.

of Harpenden

1974 Entered the calculator market with the Tek31 and Tek21 desk calculators.

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