That's N7896C, BuNo 79863. It had last flown in '66 for an NAS Glenview open house (I was there but don't remember much.) The wasps hadn't taken it over at this point, otherwise your dad wouldn't have been standing that close! When I saw it at Oshkosh, I was amazed to hear that the restoration had cost $150,000 (in 1980 dollars).
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All right, Mister Dorfmann, start pullin'!
Pilot: "Flap switch works hard in down position."
Mechanic: "Flap switch checked OK. Pilot needs more P.T." - Flight report, TB-17G 42-102875 (Hobbs AAF)