Vintage Burroughs Full-Key Adding Machine

This is a vintage mechanical adding machine, likely manufactured by the Burroughs Adding Machine Company, dating approximately to the mid-20th century (circa 1940s-1950s). The device features a robust cast metal chassis with a characteristic grey-toned wrinkle-finish (crackle paint) housing. It employs a full-keyboard design with seven columns of numbered keys ranging from 1 to 9, allowing for large numerical entries. The keys are color-coded in alternating black and green/teal columns to facilitate visual grouping of decimals and whole numbers. Above the keyboard is an integrated printer mechanism with paper roll attachment, used for generating physical audit trails on paper tape. To the right, a mechanical crank or motorized lever is visible, which would be used to cycle the internal gears and perform calculations. The condition appears well-used with visible dust accumulation and minor surface wear consistent with age, though the keys and basic housing remain intact. The craftsmanship reflects the industrial durability of mid-century office equipment, characterized by heavy-duty steel internals and tactile plastic keycaps. Such machines were the standard for accounting and banking before the advent of electronic calculators, representing a significant era in office automation history.

I have virtually examined this Burroughs full-keyboard adding machine, representative of the 1940s-1950s production era. The unit features the iconic grey wrinkle-finish housing and the standard seven-column key configuration. Based on visual inspection, the machine appears authentic and largely intact, exhibiting the expected mechanical patina of a mid-century office tool. The presence of the original paper roll and internal carriage components is a positive factor for collectors. The current market for mechanical adding machines is heavily saturated. While these were marvels of engineering, their high production volume means they are relatively common. Condition is the primary driver of value; this specimen shows significant dust accumulation and visible oxidation on the metal carriage, suggesting it has not been serviced or stored in a climate-controlled environment. Comparable sales for unserviced Burroughs units of this specific model typically fall within the $75 to $150 range, whereas fully professionally restored and functioning units can occasionally fetch $300 to $400. Significant value limitations exist without a physical inspection. I cannot verify the integrity of the internal gears, the state of the ink ribbon, or whether the mechanical crank cycles without snagging. A full authentication would require opening the housing to verify serial numbers against manufacturing records. To achieve a premium valuation, provenance documentation (such as original purchase receipts or service logs) and a functional demonstration would be necessary. From images alone, it is impossible to determine if internal components have suffered from 'pot metal' fatigue or gear seizure caused by hardened lubricants.