I'm pretty sure thats a B-26 Maurader... Look at the turret and the small windows on the ventral surface of the fuselage, definately looking like the -26. Its possible the marks are correct cause the -26 started being produced in 1941.
I guess so... If it were a heavier bomber I think there would be waist positions
Here's some specs
Length: 58 ft 3 in (17.8 m)
Wingspan: 71 ft 0 in (21.65 m)
Height: 21 ft 6 in (6.55 m)
Wing area: 658 ft2 (61.1 m2)