This is a rare single book end from the 1927 Restoration of the US frigate Constitution. During the major 20th-century overhaul of “Old Ironsides, ” the U. Identifying Markers: Authentic pieces typically feature an embedded metal plaque directly on the base stating: This material was taken from the original hull of the U. Frigate Constitution keel laid 1794 rebuilding 1927. This single book end is in good condition with some visible cracks and wear visible in my pictures. That measures approximately, 7 1/4″ h x 6″ w x 3 3/4 d.