BOSTON (AP) – A archivist at the Charlestown Navy Yard who was looking through boxes of archive materials discovered an old hand grenade in one of the boxes on Monday and called in the Boston police bomb squad to dispose of it.

The device was a vintage model and not currently in use by the military, police spokesman Dave Estrada said. He did not know how old it was.

Still, the bomb squad decided that the grenade could still be dangerous and brought it to Moon Island in Boston Harbor to safely destroy it.

The archivist called police at around 1:45 p.m., Estrada said.

The U.S.S. Constitution, commissioned in 1797 and known as “Old Ironsides,” docks at the Navy Yard, a national park. The ship never lost a battle, from fighting pirates in the Caribbean to British in the War of 1812. Active-duty sailors dressed in Navy uniforms from 1812 lead free tours of the ship.

AP-ES-11-29-04 1740EST