The Wayne County Sherriff's Office said Thursday that David and Susan Crooks of West Hill Road were working on the machine when they found what appeared to be a grenade in a drawer.
They called deputies who confirmed it was indeed a grenade and it appeared to be live.
Major Tom Effler said he contacted the Seymour Johnson Air force Base Explosive Ordnance Disposal Unit. The military explosives experts confirmed it was indeed a live German grenade from the World War One era.
The grenade was taken to a safe area and neutralized.
Effler said the Crooks family told investigators the sewing machine came from Florida family members and had also been in South Carolina for several years. Where the grenade came from is unknown.