09-23-2019, 03:07 PM
After searching 660L images online, I have come to the conclusion that it used the Philco "Ribbed" pattern.
A close substitute:
http://www.radiodaze.com/grille-cloth-14-item-grc14/
A close substitute:
http://www.radiodaze.com/grille-cloth-14-item-grc14/
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Ron Ramirez
Ferdinand IN