That appears to be a Hamilton Standard Propeller model 23E50. The blades appear to be the wide cord/paddle blades. The Propeller on the B-17, DC 3, B-24 used a a paddle type blade model 6477A-0 blade that had a basic diameter of 11 feet 6 inches.
I do not know the different type of reduction gears on the engines, but you may be able to tell by the remains of the engine reduction gear box if this was a Wright 1820 or a P&W 1830.
Similar looking propeller blades but larger in diameter with a basic diameter of 13 feet, were the 6501/6507/6519 blades, used on the DC-4, F4U, Lancaster. Note the engine gear box does not appear to be from a RR Merlin from a Lancaster.