From the Howard Cannon Photograph Collection (PH-00192). Stamped on verso: "Photo by: Ankers Capitol Photographers 316 F Street, N.E. Wash., D.C. 20002 Phone (202)543-2484", possibly members of the Aero Club of Washington, D.C.
From the Howard Cannon Photograph Collection (PH-00192). Stamped on verso: "Edward J. Allen Associates, INC. Nevadas Largest Photographic Organization P.O. Box 4253 - Las Vegas Nevada 89106"