If this photo was taken during the 1964 season, Jack was a mere 35 year-old man at most...
s-l1600-2.jpg
...but, since the picture seems to be from the same photoshoot as his 1964 card (meaning a 1963 shoot date, most likely), he was just a 34 year-old man (at most) at the time...
s-l1600-3.jpg
Feeling old yet?