AI Appraisal Estimate

This is a vintage pocket tape measure featuring advertising for the Chicago Furnace Supply Co. The item has a distinctive 'archtop' or semi-circular metal housing with a flat base, a design common for early-to-mid 20th-century promotional measuring tools. The case is constructed from polished brass or brass-plated metal with black recessed lettering. The face of the tool is prominently embossed with 'CHICAGO FURNACE SUPPLY CO.' in an arched serif font. Below the central rivet point, it features the slogan 'QUALITY ONLY - SINCE 1901' and technical instructions stating 'ADD 2 INCHES FOR INSIDE MEASURE,' flanked by horizontal arrows. Physically, the item appears to be approximately 2 inches in width at its base. The condition shows moderate age-related wear, including minor surface oxidation, light scratching, and some darkening of the brass patina, particularly near the edges. The tape itself is retracted and secured within the housing. The typography and construction suggest a manufacturing date between the 1930s and 1950s, serving as both a functional tool and a piece of industrial memorabilia from a long-established Illinois-based company. The craftsmanship is robust, characteristic of utility goods from that era meant for professional contractor use.

I have virtually examined this Chicago Furnace Supply Co. advertising tape measure. The item is an authentic mid-century promotional 'inside measure' tape, likely manufactured by a firm such as Lufkin or Keuffel & Esser for the supply company. The typography—specifically the arched serif font and ‘Since 1901’ branding—places the manufacture period between 1935 and 1950. The condition is graded as 'Good' to 'Very Good' for its era; while there is visible oxidation and patina, the lettering remains legible and the mechanical housing appears intact. Market demand for early HVAC and industrial memorabilia remains steady. Comparables for generic arched tape measures from this era typically fetch $20-$30, but the specific regional ties to Chicago and the robust brass construction offer a premium for local industrial collectors. The 'Add 2 Inches' instruction is a hallmark of professional-grade tools of the time, increasing its cross-appeal to tool historians. Value is primarily driven by the crossover between tool collecting and 'Chicagoland' history. However, this appraisal is based solely on high-resolution images. A physical inspection is required to confirm the retracting spring tension and the integrity of the internal tape blade, as rusted or snapped blades significantly decrease value. To fully authenticate this as a pre-war piece versus a later reproduction, I would need to inspect the internal side of the casing for manufacturer hallmarks and confirm the material composition of the tape itself (steel vs. coated linen).