Built as an N2S-5 by Boeing, BuNo 60591 was apparently allocated but not taken up, this Kaydet joining the USAAC as PT-13D 42-17800 instead. Postwar it was registered to the Boeing company in Wichita as N41766 and in 1958 was delivered to the USAF Museum with Being Vice-President aboard what was the company's last biplane flight. Until 2013 it was displayed in the standard blue/yellow training colours but following restoration was presented as it left the production line, with BuNo on tail and USAAC serial on left-side TDB, but records show that 60591 actually became 42-16550