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A Resulta - BS 7 adding machine
A Resulta - BS 7 adding machine
An older adding machine. Its mechanism is similar to a car odometer.
An older adding machine. Its mechanism is similar to a car odometer.
Adding machine for the Australian pound c.1910, note the complement numbering, and the columns set up for shillings and pence.
Adding machine for the Australian pound c.1910, note the complement numbering, and the columns set up for shillings and pence.
A manual adding machine manufactured in the 1950s.
A manual adding machine manufactured in the 1950s.
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Four of Pascal's calculators and one machine built by Lépine in 1725, Musée des Arts et Métiers
Four of Pascal's calculators and one machine built by Lépine in 1725, Musée des Arts et Métiers
Replica of Schickard´s calculator
Replica of Schickard´s calculator
Detail of a replica of an 18th-century calculating machine, designed and built by German Johann-Helfrich Müller.
Detail of a replica of an 18th-century calculating machine, designed and built by German Johann-Helfrich Müller.
A mechanical calculator from Anton Braun, dated 1727
A mechanical calculator from Anton Braun, dated 1727