Millionaire Calculating Machine with Stand

In 1895, Otto Steiger, a Swiss citizen residing in Munich, obtained a U.S. patent for a calculating machine that would multiply a number by a single digit directly, with only a single turn of a crank. Earlier calculating machines required considerably more effort.

How to operate an Electirc Millionaire Mechanical Calculator

A 'Millionaire' Calculating machine

John Wolff's Web Museum - Millionaire Register

John Wolff's Web Museum - Millionaire Register

John Wolff's Web Museum - Millionaire Register

the Millionaire Calculator, Hans W

Millionaire Calculating Machine with Stand

The Millionaire Machine - Numberphile

Millionaire Calculator by Hans W. Egli Auction Number 2763T Lot Number 1194

John Wolff's Web Museum - Millionaire - Technical Description

The Millionaire Machine - Numberphile

Mechanical calculator - Wikipedia