Here's what I came up with:
42-6976/7005 Ford B-24E-1-FO Liberator
So that means that the bomber was made at the Ford plant at Willow run Michigan. He may have taken the picture at a modification center somewhere else.
A lot of those early B-24s were flown from the factory right to modification centers to have the greenhouse glass nose replaced with a nose turret. My father flew on B-24s quite a bit, as a gunnery instructor in the states, then 13 combat missions with the 8th then 15th Airforce before ending up as a P.O.W. He told me he didn't have much use for the Ford made B-24s. He said there were a lot of quality control issues with them, including one that was missing the gun interrupter cam in the top turret causing the training crew to nearly shoot off the tail.