This rare antique rest room sign is from a Humble service station. The sign is a white rectangle with a black border. In red block letters, the sign bears the following message: “The next user of this rest room will appreciate your cooperation in helping us keep it as clean as possible.” The courteous message ends, and features the Humble logo in a black oval at the bottom.

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May 17, 2013 Antique Advertising Signs, Antique Transportation Advertisements