National Coal Association Convention delegates in 1930 Dodge Eight automobiles

View of National Coal Association Convention delegates in rows of 1930 Dodge Eight automobiles, led by two police motorcycle escorts. Typed on back: "Convention tours city in Dodge Eights. More than 200 delegates to the National Coal Association Convention held from Wednesday to Saturday of this week, were taken for a tour of the city and a visit to the principal points of interest around Detroit the opending day of their meet in 50 Dodge Brothers eight-in-line sedans through the courtesy of Dodge Brothers Corporation. Their tour included an inspection of the Dodge and Plymouth manufacturing plants. They are shown as they lined up, two abreast, near the Book Cadillac Hotel." Handwritten on back: "Dodge, 1930."