Photograph of servicemen standing with machinery and motors next to Mobile Training Unit trucks in front of Curtiss Wright Technical Institute, Southern California, 1944. "Cr[ilg] Central Air; Grand Central Air Terminal Main Entrance" -- building signage. "Curtiss Wright, Technical Institute, Special Devices Mfg. Div." -- on billboard. "B 29 Mobile Training Unit No. 40; Army Air [ilg] Training Command" -- on trailers. "'Ol'Dobbin'" -- on truck. "Load Adjuster; B-29, Oxygen Flow Diagram; Vacuum & De-Icer Flow Diagram-B-29; To Be Used Only By, Authorized Instrument Maintenance, Personnel" -- signage on training displays.