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My father had several signs that had been in the attic of the building he had his business in. The building had been a Ford dealership in the 20's-30's. Most of the posters were from Ford but there were also some MobilOil and Shell items. There is one sign in particular I would like to get a value on. It has a red background and states "The Chinese doctor keeps cars well" and "Have you joined his club?" It is 34"x23" and in pretty good shape. Any idea on the history and/or value of this?

Thanks,

Brian

Chinese doctor