Historic Office Equipment Appraisal

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Monroe Calculating Machine

The item is an antique mechanical calculating machine, specifically identified as a Monroe model, based on the visible 'Monroe' script logo on the front panel. It appears to be constructed primarily from metal, likely cast iron or steel, with a dark, possibly olive green or black, painted finish now largely obscured by grime and wear. The machine features a prominent array of cylindrical number keys, arranged in multiple columns, with each key displaying a number from '1' to '9'. The keys are 'cream' or 'off-white' in color with dark numerals, suggesting a material like celluloid or early plastic over a metal stem. The overall aesthetic points to an early to mid-20th-century design, characteristic of the mechanical calculators that preceded electronic versions. The condition is heavily aged; there is significant dust and dirt accumulation across the entire surface, suggesting it has been stored for a long period in a non-climate-controlled environment. The metal surfaces show visible signs of wear, scratching, and possibly minor corrosion or rust, particularly on the non-painted components such as the crank handle on the front. One or two red-colored buttons are visible on the right side, which would perform specific functions like clearing. The top section of the machine, above the main keyboard, features a register or display mechanism with sliders and additional numeric indicators, which are also dusty. The craftsmanship appears robust and utilitarian, indicative of industrial manufacturing practices of its era. This calculating machine would have been a significant piece of office equipment, reflecting mechanical precision and complex gearing to perform arithmetic operations.

Estimated Value

$100-200

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