'Boeing airplane C-11', perhaps at the factory. The Boeing Model 3 was a slightly revised version of the Model 2. The other two Model 3 airframes, C-5 and C-6, were sold to the US Navy and C-11, modified from airframe C-4, was reportedly delivered to a private owner in Bremerton, Washington in July 1918. Photo source says 1917 but that seems unlikely. Photo from: Katherine Stinson Pictorial Collection / University of New Mexico