Royal Digital 5-M

Display is 8 digits, green fluorescent in a single tube.

4-function, memory.

6v (4x AA cells).

88 mm x 150 mm x 36 mm (3.5" x 5.9" x 1.4").

Introduced 1972.

Made in Japan, for Imperial Typewriter Company Limited, Leicester, England.

In 1973 this model cost £49.95 [about US$115].