Toss up between J-3 Cub (pilot trainee in 1962), T2V (T-33B, a Navy T-33 as a Fam flight, Pax-Crew?), R4D (PAX) or P2V (PAX),
I really don't know which of these is the oldest as far as date of manufacture. Probaby the R4D: The most interesting of these was the P2V-7S or P-2H a photo of the same aircraft is shown below (taken in 1975) when it was visiting NAS New Orleans., LA. In 1963, the same aircraft suffered a mishap while attached to VP-17 and is shown in the second photo. I caught a 2.4 hour training hop in this aircraft when it was assigned to reserve squadron VP-69 out of NAS Whidbey Island as a joy ride in 1971. They transferred to P-3A shortly around 1975. I had left active duty the previous year.
In 2003, this same aircraft, apparently used as a privaely owned water bomber, crashed while flying up a cloud obscured California valley, killing the flight crew (No one else aboard). Bureau number: 147961