No. 95435920

Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad
No. 95435920

Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad
The rack-and-pinion printing machine with a numeric keypad, model FDM6689, represents an important technological milestone of the 1930s. Designed by Thomas O. Mehan in collaboration with Thomas V. Brennan, this machine was marketed around 1932.
Surprisingly, it still bears the "Dalton" brand, despite the Dalton Adding Machine Company being sold to Remington Rand in 1927.
From a mechanical point of view, the Dalton is a nine-column addresser capable of writing and equipped with a totalizer display. For subtraction, it uses the 9's complement and has a front indicator initially positioned in an awkward way, with a reset for the entered digits. Subsequently, this indicator was improved with the introduction of a more practical upper indicator.
The production lasted until 1935.
Original conserved - see photos that are an integral part of the description.
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