Magic brain' calculator. C.1955

'Magic Brain' calculator, c 1960.
Magic Brain' calculator made by Chadwick in tin and plastic, with stylus and instructions. C.1955. Very similar to the Exaxctus and other stylus calculators of the period, the Magic Brain could add, subtact, and multiply and duivide by repeated addition and subtraction.
 
Currently on display in:
Mathematics
Year made :
c.1955
Inventory number :
1986-1556