Inscription by Bowers on verso: "Martin YB-10A. YYB-10A 33-154. Turbo-supercharged R-1820-31. Note 154 of serial number on fin. Note Wright Field arrow insignia. Blue fuselage."
[Martin YB-10A aircraft], [2008-03-31_image_558]. Museum of Flight Digital Collections, accessed 08/12/2025, https://digitalcollections.museumofflight.org/nodes/view/10736