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Spirit of Richmond, Mich
(a higher resolution scan was made available) Possible data on fuselage: P-51B-15-NA
This data has been confirmed by Mr. Jim Powell of the Louis Memorial Library in Richmond MI. There is a large picture of this P-51B in the library.
Photo looks like North American's El Segundo (Los Angeles) plant in about 1944. Airplane was probably bought with war bonds by the good people of Richmond, Michigan.