A 1921 comptometer is worth around $149 in good condition. The comptometer was the very first successful key-driven mechanical calculator that was patented by Dorr E. Felt in the year 1887.
It's worth as much as your mamma down on the street corner.
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A 1921 comptometer is worth around $149 in good condition. The comptometer was the very first successful key-driven mechanical calculator that was patented by Dorr E. Felt in the year 1887.
Produced in the 1940s. This was the first Fell and Tarrant machine to have keys the same height above a sloped face plate and it was driven by an electric motor. A model H was recently offered for $35 and a K must be double that at least.
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