St Clair Flats, Michigan Postal History Postcard Accumulation - A pictorial and postal history of St. Clair Flats, MI and the passenger cruise ships traveling there. Over 225 picture postcards, mainly pre-1920, plus some covers and ephemera. Includes 20 PPCs with Detroit & Algonac Steamboat RFD cancels or marine PO cancels. An in-depth study of this popular historical Michigan topical. Housed in 3 White Ace cover albums. Tough to duplicate! (Est $450-500) (Image)