Looks like a distorted instance of ITC Anna:
http://www.myfonts.com/fonts/linotype/itc-anna/anna-itc/testdrive.html?s=PCSI&p=72

The P could be a modified B or R from the same font; those letters have the extended crossbar.

marcox - thanks so much for the link…

The font is called “Twentieth Century Poster1” (Monotype). Can’t find an URL with an online showing of the font. It’s not the same font as the Twentieth Century Poster font which is currently offered by Monotype Imaging.