Distinctive features: A large calculator from the early 1970s which requires 48 integrated circuits.
Capabilities: 4-function & memory.
Display: 12 digits, individual blue-green Vacuum Fluorescent Display (VFD) tubes.
Technology: 48 Medium Scale Integrated-Circuits (MSI) from Hitachi and Mitsubishi.
Size: 213 mm x 300 mm x 76 mm (8.5" x 12" x 3"), 2.7 Kg (6 lbs.).
Significance: Made in Japan for
Adlerwerke AG, Frankfurt/M [Germany].
T-A Vertriebs-GmbH, 85 Nurnberg [Germany].
(Divisions of Litton Industries, Inc.)
During a period of diversification in the 1960s Litton Industries of the U.S.A. had bought the Royal Typewriter company, the Imperial Typewriter Company of Britain and the Triumph-Adler Office Machine company of Germany. Mechanical and electronic calculators were sold under the Royal, Imperial, Triumph, and Adler names. All Adler electronic models appear to have been manufactured by other companies.
Was advertised in early 1971 by the British distributor Office and Electronic Machines Ltd. (OEM) of London.
Here the top has been removed to reveal the circuit board with, from top to bottom, the power supply, the Vacuum Fluorescent Display (VFD) tubes, and some of the 48 Medium Scale Integrated-Circuits (MSI) mainly in Dual In-Line (DIL) packages and with two in metal cans.
The circuit board is double sided and here its underside is shown with the rest of the integrated circuits.
Very noticeable are the number of jumper wires, usually an indication that modifications to the circuit were required.
© Text & photographs copyright Nigel Tout 2000-2023 except where noted otherwise.