This unique set features two first day covers commemorating the 250th anniversary of Detroit. The covers showcase a 3 cent stamp with a blue color and a VF grade, depicting historical events. The cancellation type is First Day of Issue. The covers are used and come with a cachet. The United States is the country of origin and manufacture for this item. The denomination of the stamps is clearly shown on the covers. The covers fall under the categories of 1951, FDCs, Covers, United States, and Stamps. This set is a fantastic addition to any stamp collection and a great way to celebrate the history of Detroit.