As we know: Fokker Atlantic----General Aviation------North American Aviation....
General Aviation(ex-Fokker) GA-15-----NA-15
General Aviation(ex-Fokker) GA-16-----NA-16
NA-15---------XO-47,observation aircraft
NA-16---------trainer aircraft
NA-17--------- ?
NA-18---------trainer aircraft
NA-19---------basic trainer BT-9,BT-9A
NA-20---------NA-16-2H
NA-21---------high altitude,twin engine bomber---XB-21
NA-22---------BT-9...
NA-23--------BT-9B
NA-24-------- ?
NA-25--------0-47A
NA-26--------BT-9D, BC-1(?)
NA-27--------NA-16-2H
NA-28--------NJ-1
NA-29--------BT-9C,Y1BT-10
NA-30--------Y1BT-10
NA-31--------NA-16-2H or NA-16-4M (?)
NA-32--------NA-16-1A, 1 to Australia
NA-33--------NA-16-2K, 1 to Australia
NA-34--------NA-16-4P, 30 to Argentina
NA-35--------Vega 35
NA-36--------BC-1A
NA-37--------NA-16-4R, 1 To Japan
NA-38--------NA-16-4M, 2 to Sweden
NA-39--------XB-21
NA-40--------pre-B-25 "Mitchell"
General Aviation(ex-Fokker) GA-15-----NA-15
General Aviation(ex-Fokker) GA-16-----NA-16
NA-15---------XO-47,observation aircraft
NA-16---------trainer aircraft
NA-17--------- ?
NA-18---------trainer aircraft
NA-19---------basic trainer BT-9,BT-9A
NA-20---------NA-16-2H
NA-21---------high altitude,twin engine bomber---XB-21
NA-22---------BT-9...
NA-23--------BT-9B
NA-24-------- ?
NA-25--------0-47A
NA-26--------BT-9D, BC-1(?)
NA-27--------NA-16-2H
NA-28--------NJ-1
NA-29--------BT-9C,Y1BT-10
NA-30--------Y1BT-10
NA-31--------NA-16-2H or NA-16-4M (?)
NA-32--------NA-16-1A, 1 to Australia
NA-33--------NA-16-2K, 1 to Australia
NA-34--------NA-16-4P, 30 to Argentina
NA-35--------Vega 35
NA-36--------BC-1A
NA-37--------NA-16-4R, 1 To Japan
NA-38--------NA-16-4M, 2 to Sweden
NA-39--------XB-21
NA-40--------pre-B-25 "Mitchell"