Royal Five GT
Royal Five GT
Display is 8 digits, green fluorescent in a single tube (note that the 3rd digit is not working on the example above).
4-function, %, memory.
Main integrated circuit - Western Digital LC1552 (here date coded 7442).
6 v (4 x AA).
92 mm x 156 mm x 39 mm (3.6" x 6.2" x 1.5").
About 1974.
Made in Japan for Imperial Typewriter Company Limited, Leicester, England.
Rear view showing the unusual battery pack.
Imperial models
Vintage British Calculators
Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2024.