[Paul Philco322]

Greetings all:

I have a Philco 42 345T, it is a fine set. On the rear of the chassis there is a 3 pin jack, 2 pins side to side one pin above the two, it is oval in shape and is brown bakelite. Can any of you folks tell me what it was for? Is it something I could use to connect an outside source to the set? Can a suitable adapter still be found for this jack?:

Any information is much appreciated.


Paul