AS68533 Sperry-Verville M-1 Messenger National Museum of the United States Air Force Wright Patterson AFB (FFO / KFFO), USA - Ohio Dave Welch - 02/1973
AS68533 Verville-Sperry M-1 Messenger National Air and Space Museum (USA) Washington - NASM Steven F Udvar-Hazy Center, USA - Virginia Chris England - 01/10/2007
