08-20-2013, 11:24 PM
The mica caps in question are not silver mica capacitors but cheaply made conventional units made in house by Philco from 1939-42. They are larger, physically and in capacity, to the usual domino coded ones molded in Bakelite, and they are sealed with wax. What usually happens is that these style mica caps become leaky and prevent the push button banks from working properly.
Regards
Arran
Regards
Arran