Clive Dunn played Corporal Jones in the British sitcom 'Dad's Army'. How old was he when he first portrayed this character part?

Clive Robert Benjamin Dunn, OBE (9 January 1920 – 6 November 2012) was an English actor, comedian, artist, author, and singer. He was best known for playing the elderly Lance Corporal Jones in the BBC sitcom Dad's Army.

Dunn was one of the younger members of the Dad's Army cast when, at 48, he took on the role of the elderly butcher whose military service in earlier wars made him the most experienced member of the Walmington-on-Sea Home Guard, as well as one of the most decrepit. Jack Haig and David Jason had previously been considered for the role. His relative youth, compared with most of the cast, meant that he was handed much of the physical comedy in the show, which many of the other cast members were no longer capable of.