Six mid 20th Century Wedgwood zinc over copper lithograph printing plates, each with an engraved ship in full sail with accompanying text beneath, the designs for the commemoration of the 150th anniversary of the Peabody Museum of Salem, Massachusetts comprising Ship Highlander of Salem, Ship Sooloo of Salem, Brig Cruger of Salem, Ship Monk of Salem, Ship Ulysses of Salem and Brig Olinda of Salem, plate size 25.5cm x 19cm. (6)