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Decimo Ready Reckoner
Decimo Ready Reckoner

Decimo Ready Reckoner (aka model 674).

6v (4x N cells).

Display is 8 digits, red LED.

4 function, %.

Integrated circuit - Texas Instruments TMS0803NC (here date coded mid-1974).

69 x 149 x 17 mm (2.7" x 5.9" x 0.7").

Country of manufacture unknown.

A very thin calculator.
Inside

Inside the calculator showing the circuit board with the integrated circuit and driver transisitors.
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© Text & photographs copyright Nigel Tout   2000-2012 except where noted otherwise.