Actually if I'm not mistaken, This is conglomeration of atleast 3 maybe 4 airframes. IIRC the Serial No.s are listed on previous threads. And the Ball turret depicted is the one from the Bar in Greenly CO.
44-85813 is the serial number of the plane currently registered as N3154S (formerly N6694C), which is the Registry of what will be the result of the Urbana rebuild.
However, it incorporates parts from a number of airframes, and their histories are quite interesting.
Looking at the bits and pieces as they arrived, plus info made available from the restoration team...
44-83316: Fuselage centre section.
'316 was a B-17G-75-DL, sold by the Air Force to 20th Century Fox in 1964 and used as a prop for the 12 O'clock High TV series. The forward fuselage of '316 had already been fitted to 44-85813 in an earlier rebuild sometime between 1967 and 1983.
44-83525: Tail.
'525 was a B-17G-85-DL, and was the last B-17 to remain at the Davis Mothan storage yard, being there until 1967. After film work, including "The War Lover", and the rounds of various museums she was displayed as Suzy Q in Florida until damaged in Hurricane Andrew, currently believed to be under restoration. Her Civil Registration is N83525.
44-83722: Wings and Fuselage parts.
B-17G-95-DL '722 was converted from a B-17G to a B-17H/SB-17G air-sea rescue aircraft with a lifeboat underneath, then became a training version of the same (TB-17H) before being used as a target for Atom Bomb tests in Nevada until 1965. The remaining hulk was used for spare parts, ending up being owned by the same chap as '525.
44-85813: Parts and identity.
B-17G-110-VE '813 was used by the Curtiss-Wright Corporation from 1945 to 1966 as an turboprop engine testbed (EB-17G/JB-17G), with a fifth powerplant fitted to the nose. After that (around 1969-70) she was rebuilt to standard using the forward fuselage from '316 and flown as a firebombing tanker before crashing in 1980.
So... should she really be called 44-83316, as that's where 2/3 of the fuselage comes from, or 44-83722 due to having her wings?