Rare 19th c. cast brass “Circumfercenter”, impressed “HW” (Henry Wadsworth), “1877 August 21, Patented”, with printed directionals on a paper label (slight tears), and printed “Henry Wadsworth, Duxbury Mass. U.S.A., Circumfercenter”, tagged history “found in Hingham on Mill St. JPR”, 6″ dia, (ex. John P. Richardson collection).