Calculators

Addix

Calculators: general guide

Felt&Tarrant Comptometer
Comptometer 3D11 (1950-1961)

Olivetti
Divisumma 18
Divisumma 422

PAYEN Aritmometer P3A (1897)

Thales
Thales Patent Rechenmachine

Torpedo
Torpedo Schnell Addiermachine

Underwood
Underwood 330
Underwood 400, 410, 200 (Dry ink jet series)