Donald Pleasence was 42 in The Great Escape when he played the character 'Blythe 'The Forger''.
That was over 61 years ago in 1963.
In 1995 he died aged 75, starring in 178 films in his career, 145 of those after The Great Escape was first released. If he were alive today he would be 104.
In The Great Escape, I think Donald Pleasence looks: