Pye P-640
The first calculator I ever owned - a Pye P640
If I remember correctly, this basic calculator cost me about £25 in 1975.
That was less than the normal retail price as I worked for Mullard,
part of the Philips group of companies, and Philips owned Pye.
More info on this model here.
Below is the same calculator shown with its mains power unit and instruction book.
This set of images © Barry Smith, 2005
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