[QUOTE=Don Lindsly]True, Diamond D was a marketing differentiation. Philco had two new console lines in '57, Golden D and Diamond D. The Diamond D was the high tier line. Transitone was revived for first year portables.
Charlie,
Check out this 1956 Philco "Diamond D" ad:
http://cgi.ebay.com/56-Philco-Diamon...QQcmdZViewItem
-Steve D.