San Francisco California Thomas Radiator 1940s Ad Blotter 1912 Maxwell 3.5 x 6

This 1940s advertising blotter from Thomas Radiator Company in San Francisco, California reflects automotive service marketing tied to early car history and maintenance industries.

Radiator repair and rebuilding services became essential as automobiles aged and required ongoing mechanical upkeep, particularly in urban centers with high vehicle density. Businesses like Thomas Radiator Company promoted reliability and technical expertise while connecting their services to the broader evolution of the automobile. Advertising blotters, commonly distributed for desk use, served as both functional office items and promotional tools, keeping company names visible in everyday settings.

The blotter features a stylized illustration labeled 1912 Maxwell automobile, paired with the company’s radiator emblem and service list including cleaning, repairing, and recoring. Contact information and address on Golden Gate Avenue in San Francisco are clearly printed, along with a claim of maintaining one of the largest rebuilt radiator stocks on the coast. The layout combines automotive imagery with bold typography, presenting a clean mid-century advertising format.

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