np, nd (1930s?). Paperback. Very Good. Item #21-4930
10.5 x 6.5", one sheet, designed to be folded in three for mailing, one side has a promotional letter, the other two colorful images of the French cities of Angers and Josselin. Postally unused, fold creases, light soiling else good. The laboratory was located at 6504 Chene Street at Milwaukee Avenue, Detroit. "Service to Doctors of Dental-Surgery"