Sold In Aid of St. Dunstan's Hostel luminous celluloid matchbox cover

A scarce original 'Charity souvenir of the First World War celluloid matchbox cover' the front depicting a portrait of a 'Soldier' the reverse a 'Sailor' within luminous surround; the spine inscribed with printed details 'IN AID OF 'St. DUNSTAN'S HOSTEL, Regent's Park, for Soldiers and Sailors BLINDED IN THE GREAT WAR' 'To obtain full luminous effect keep exposed to daylight or artiificial light when possible', Pat. App. For. Fair condition, heavy foxing, luminous effect untested.