Available
from around 1927 through to the 1930's. Original cost one shilling
Mica capacitor enclosed in a bakelite case with parallel/series
grid leak resistor clips. This capacitor could be mounted upright or
flat. An advert in December 1932 edition of "The Wireless Constructor"
states the capacitors are tested to 750 volts.
The advert shown opposite is from May 1928 edition of
"Wireless Magazine"