Plans to hold the Great Centenary Charity Auction at Raynham Hall, near Fakenham, were announced during a ceremony there last month.
Col David James, chairman of the Fakenham and District Branch of the Royal British Legion, urged people to donate their military items to raise money for bomb blast victims.
The first consignment of donated items includes the memorial cross, given to the family of fallen Canadian soldier Private H Sayers, who was killed in action during the Great War.
After receiving the donation, Mr James has been able to discover that the soldier whose name is inscribed on the medal was killed in action in April 19, 1916 at the age of 32. Private Sayers, who was the son of William H and Mary Sayers, is buried at the Aeroplane Cemetery in Belgium.
Mr James, who runs the James and Sons auction business in Fakenham, estimates that the medal could fetch about £80-£120.
Other items which have so far been sent in for the auction include uniforms, bayonets, and an officer’s camp bed which went to the Crimea.
The auction will be held at Raynham Hall in September.