There is some doubt as to the true identity of this aircraft. It was in a preserved state in 1989. I found a reference that MST had been the former APY with MAP 55-3181 from a batch 53-5177 to 5181 going to France under MDAP. Two c/ns are listed 55-901 and 55-902. Still, airframe 3181 found its way into the le Bourget museum. The reseachers there must have been certain. But is it the same aircraft?