Bomb disposal teams were called to Welshpool on VE Day after a genuine 1930s German grenade was found in a shed in the town.
Police were called to a property in Salop Road after a family found the device while clearing out a shed, followed by a unit from the Royal Logistics Corps based in Ashchurch, Tewkesbury.
The device, which was marked with the date 1937, was x-rayed and found to be safe, and given to Julie Prince's 16-year-old son to keep.
Mrs Prince said the shed had belonged to her late father Roger Jary, a handyman in Welshpool, who had a large collection of tools and other items in his shed.
In a statement sent to the county times, the Prince family said: "Police were called at 12.49 yesterday afternoon to a property in Salop Road, Welshpool after a WW2 incendiary device was found during a shed clear out. The device had clear markings showing the date of 1937.
"The device, of unknown origin, was found tucked away on a top shelf of a shed inherited from the late Mr Roger Jary, and carefully moved to a relatively safe distance on a lawn.
"The police were on the scene within minutes and confirmed that the device was a German incendiary device and called the EOD (Explosive Ordnance Disposal), the Royal Logistics Corps located a 2hr drive away in Ashchurch, Tewkesbury.
"On arrival, they confirmed that it was a German incendiary device and believed it was safe. This was confirmed in minutes by an X-ray of the device."
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