Inscription on verso: "Boeing Model 40B-4."Creation Datecirca 1920s-1930sSubjectBoeing Model 40B-4Extent1 photograph : print, black and white ; 10 x 8 inLanguageEnglishOriginal Formatphotographic printsBibliographic CitationThe Peter M. Bowers Photograph Collection and Papers/The Museum of FlightRightsCopyright undetermined
[Boeing Model 40B-4 aircraft], [2008-03-31_image_674]. Museum of Flight Digital Collections, accessed 14/01/2026, https://digitalcollections.museumofflight.org/nodes/view/10852
![[Boeing Model 40B-4 aircraft]](/img/placeholder.gif?1762283163 "[Boeing Model 40B-4 aircraft]")