The Guinea Pig Club was formed in June 1941 by 39 aircrew patients at Queen Victoria Hospital, East Grinstead, who were receiving plastic surgery for burns. The club grew to 649 members by the end of the war, of whom about 50 remain.
Members have met regularly over the past 67 years. Donations from the RAF Benevolent Fund and legacies were used to care for members of the Guinea Pigs and widows of their comrades. Now the club is donating funds to the RAFBF.
Jack Toper, retiring chairman of the Guinea Pig Club, said: "We're delighted to make this donation and, in some small way, repay the RAFBF for its many kindnesses towards our members over the years."