Addiator Arithma
ADDO Mod 16
ADDO-X 331
Brunsviga 13RK
Brunsviga 13ZK
Calculator "Superautomat SASL"
Facit 1004
Facit EK
Mechanical calculator MADAS
Mellita, Model V/16
Monroe Model L200-X
Nisa PK 5
Original Produx Calculator
Remington Rand Adding Machine
Walther DE 100
Walther RM
XxX calculator

Mechanical calculator MADAS
H.W. Egli S.A., Zurich, 1965
The name "Madas" is derived from the initial letters of "Multiplication, Automatic Division, Addition, & Subtraction" - Electric motor driven
The operation principle of this arithmometer was initially conceived by Leibniz and the first design patented in France in 1820 by Charles Xavier Thomas de Colmar.
A gift from Jaques Chevalier
The computer was used for training statisticians in the area of insurance and finance at the Institut of Statistics of the Paris University (ISUP) Exhibit on YouTube: http://www.youtube.com/watch?v=zaecbcXzELI