Inscription on verso: "Boeing Model 40B-4 / Boeing Photo?"
Stamped on verso: "Return to Peter M. Bowers."Creation Datecirca 1920s-1930sSubjectBoeing Model 40B-4United AirlinesExtent1 photograph : print, black and white ; 10 x 8 in.LanguageEnglishOriginal Formatphotographic printsBibliographic CitationThe Peter M. Bowers Photograph Collection and Papers/The Museum of FlightRightsCopyright undetermined
[Boeing Model 40B-4 aircraft in front of UAL hangar], [2008-03-31_image_672]. Museum of Flight Digital Collections, accessed 15/02/2026, https://digitalcollections.museumofflight.org/nodes/view/10850
![[Boeing Model 40B-4 aircraft in front of UAL hangar]](/img/placeholder.gif?1768172494 "[Boeing Model 40B-4 aircraft in front of UAL hangar]")