Unused advertising ink blotter from the Stewart Hartshorn Company, for aircraft tie rods. The front of the card advertises: "Square Section Tie Rods For Internal Aircraft Bracing; Used in Curtiss-Robertson Planes; Stewart Hartshorn Company; 250 Fifth Avenue, New York City. The front of the card is clean and undamaged. Purchased on eBay from: Kit Barry Ephemera; 74 Cotton Mill Hill #A252; Brattleboro VT 05301; [email protected]; 802-380-5611
