Category:Keystone

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Keystone is an American company that produced calculators in the 1970s. Keystone calculators are known for this use of Panaplex displays on portable calculators.

Pages in category "Keystone"

This category contains only the following page.

K

Keystone 395

Media in category "Keystone"

The following 5 files are in this category, out of 5 total.

Keystone 395 board bottom.jpg 1,799 × 2,782; 2.11 MB
Keystone 395 board top.jpg 1,435 × 2,300; 1.03 MB
Keystone 395 keypad rear.jpg 1,600 × 1,998; 954 KB
Keystone 395 rear.jpg 1,777 × 2,712; 1.63 MB
Keystone 395.jpg 1,545 × 2,265; 713 KB

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