|While I can't say with 100% certainty, this is probably the 345th Bombardment Squadron at Lecce, Italy|
There are two photos on the internet that show the wreck of Everybody’s Sweetheart, one here and one here. The photos show that the left vertical stabilizer had been pretty well shot up, but the right appears unscathed. Army records show that the plane was “salvaged” on 4 April 1944, and it would make sense, then, that the maintenance crews would save a perfectly good stabilizer and rudder that then might be able to be used on another aircraft, later.
Everybody’s Sweetheart was assigned to the 345th Bombardment Squadron, 98th Bombardment Group, 15th Air Force, and during this timeframe, the 345th was stationed at Lecce Airfield, Italy (way down in the “heel” of the country), so it’s likely that this is the squadron and location where our photo was taken.
There is also a first-person account of the landing by waist gunner Gene Robinson that has been preserved online, here.
Sadly, though, the identity of the main Liberator in our photo remains a mystery.