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 the calculator showing the circuit board with the integrated circuit and driver transisitors.
Vintage British Calculators
© Text & photographs copyright Nigel Tout 2000-2019 except where noted otherwise.