Fine picture of a D-3. Otherwise not a lot to go on. So we are looking at lettering created at some time between the 1940s and mid 1950s. The best candidate I can suggest is Twentieth Century Condensed Ultra Bold Italic

designed by Sol Hess for Monotype between 1936 and 1947 http://www.identifont.com/find?font=Twentieth+Century+Condensed+Ultra+Bo... and http://www.myfonts.com/fonts/mti/twentieth-century-mt/
Don
