08-30-2021, 11:25 PM
Have a look at this pamphlet I posted a number of years ago. Believe it dates to 1930
https://philcoradio.com/phorum/showthread.php?tid=10763
https://philcoradio.com/phorum/showthread.php?tid=10763
Greg V.
West Bend, WI
Member WARCI.org