The reverse of this Douglas Aircraft Company publicity photograph bears official manufacturer stamps identifying the subject as the 'Douglas Navy A4D-1' Skyhawk, along with a library accession stamp dated March 5, 1956. Such backstamps, applied by Douglas's Santa Monica headquarters and El Segundo Division public relations office, were standard practice for tracking and distributing manufacturer photographs to the press and archives during the 1950s, and they provide valuable documentation for dating and verifying historical aviation photographs. Project: 218463