Martin Balsam was 40 in Breakfast at Tiffany's when he played the character 'O.J. Berman'.
That was over 63 years ago in 1961.
In 1996 he died aged 76, starring in 101 films in his career, 88 of those after Breakfast at Tiffany's was first released. If he were alive today he would be 104.
In Breakfast at Tiffany's, I think Martin Balsam looks: