Busicom Mechanical Calculator HL-21

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Hand operated, Odhner type pin-wheel mechanical calculator
Capacity - 10 places on the setting register, 11 places on the quotient register, and 21 places on the product register.

410 mm x 164 mm, 130 mm (16.5" x 6.5" x 5"), 4  Kg (9 lbs.).
Made in Japan.
Dates from 1960s - introduced in UK in 1966.

Advertised as the "Busicom Educational Calculator". "Price £60 [Sterling], reducing to £39 10s. for educational users."

Makes extensive use of plastics and diecast metals compared to the pinwheel models of the time by other manufacturers, such as the Odhner.

With the introduction of electronics Nippon Calculator became called Business Computer Corporation, known as Busicom Corp

Internal picture can be seen at http://www.vintagecalculators.com/html/hl-21.html

Our calculator with a soft cover was very kindly donated by Aubrey Thyer

Manufacturer: Busicom
Date: 1960

This exhibit has a reference ID of CH12273. Please quote this reference ID in any communication with the Centre for Computing History.


Busicom Mechanical Calculator HL-21

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