USS Massachusetts Propeller
This 38,030 pound manganese-bronze propeller was manufactured at Philadelphia Navy Yard and was removed from Battleship Massachusetts during her 1998-1999 drydocking. It is one of four. When turning at 185 revolutions per minute, they propelled the 35,000 ton ship at speeds up to 29 knots.
USS Massachusetts was built at the Bethlehem Steel Fore River Shipyard in Quincy, Massachusetts and was commissioned May 12, 1942. She received 11 battle stars and a Philippine Republic Presidential Unit Citation while operating in the Atlantic and Pacific Theatres during WWII.
"Big Mamie" was decommissioned and transferred to the Reserve Fleet in 1947. In 1965 she was enshrined here at Battleship Cove as the Commonwealth's official World War II memorial.
Marker is on Central Street, on the right.
Courtesy hmdb.org