Burroughs Portable Adding Machine Value Guide

The Burroughs Portable Adding Machine, produced between 1920 and 1930, represents a pivotal shift in American accounting history by bringing mechanical precision to a compact form. These machines are highly collectible for their intricate internal gears and the legacy of William Seward Burroughs' innovative engineering.

What affects the value of Burroughs Portable Adding Machine?

• Mechanical functionality is paramount; machines that still perform arithmetic and clear totals command higher prices.
• The cosmetic condition of the Bakelite keys and the integrity of the rubber feet significantly impact the $180 valuation.
• Presence of original accessories, such as the specialized paper rolls or the protective carrying case, increases collector interest.
• Paint condition, specifically the absence of heavy rusting or chipping on the metal housing, preserves the item's aesthetic value.

How to Identify Burroughs Portable Adding Machine?

• Look for the distinct Burroughs Corporation branding and logo plates typically found on the front or rear of the metal casing.
• Verify the presence of original Bakelite keys which should feature clear, legible numerical engravings.
• Check for the signature glass side panels or the specific black crinkle-finish paint common to 1920s portable models.
• Locate the serial number stamped into the metal frame to confirm the production date between 1920 and 1930.

History of Burroughs Portable Adding Machine

Burroughs Corporation was a major American manufacturer of business equipment. Founded in 1886 by William Seward Burroughs, the company quickly became known for its innovative adding machines. These machines revolutionized accounting practices in the early 20th century, making complex calculations faster and more accurate than manual methods. The portable models were particularly popular for their convenience in various office and retail settings.