North American XP-51D-1-NA 42-106540These are 1 72 scale decals for North American XP 51D 1 NA, serial 42 106540, United States Army Air Forces the mirror image companion to the bubble canopy P 51B prototype, and together the two airframes that defined the path to the definitive P 51D Mustang. Where the P 51B prototype (43 12102) combined a P 51D fuselage with P 51B wings, the XP 51D took the opposite approach: engineers retained the original P 51B razorback fuselage while fitting the