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© 2017 Bill Denheld & Nigel Tout

This is a new article which was not originally in "The International Calculator Collector".

Bill Denheld, Denheld Industrial Design and Keon Calculators

Bill Denheld heads DiD (Denheld Industrial Design) in Victoria, Australia.  In 1971 he designed and prototyped the the Keon calculators displayed here, which makes them possibly the first example of locally designed and developed electronic pocket calculators made in Australia.  The electronics was by Quainn Bros. and it was marketed by Keon, and was a revolution at the time but heavy on batteries.

Bill Denheld with an example of the Keon calculator which he designed in 1971.

The Keon calculators designed by Bill are very distinctive in the size of the buttons, which makes operating the calculators very easy.

Below are details of the Keon KE-003A calculator:

Keon KE-003A

Display is 8 digits, red LED.

Power supply is 4x AA batteries.

4 functions.

76 x 161 x 22 mm / 3.0" x 6.3" x 0.9".

"Made in Hong Kong
Keon, London, Hong Kong, Melbourne"

Keon calculators in a selection of colours.

The website of Denheld Industrial Design can be reached at http://www.denheldid.com/.

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2023  except where noted otherwise.