0verall: 26.5 x 72.2 x 121.5mm (1 1/16 x 2 13/16 x 4 13/16 in.)
Metal fragment; according to the paper label affixed to this piece, it is a plate from the turret of U.S.S. Monitor, discarded by Ericsson just after its victorious engagement with the Confederate vessel Merrimac in 1862.
Gift of the Naval History Society, 1925
Due to ongoing research, information about this object is subject to change.