A British Army Explosive Ordnance Disposal (EOD) team from Colchester was called to Mundesley beach on Sunday, June 28, after the object was discovered.
A Coastguard team set up a cordon to make sure no-one else wandered onto the beach while the bomb squad were inspecting the object.
Pete Revell, Bacton Coastguard rescue officer, said it turned out to be a two-inch red smoke mortar round from the Second World War.
Source: Eastern Daily Press