Be sure to click 'more' and select 'suggest as answer'!
If you're the thread creator, be sure to click 'more' then 'Verify as Answer'!
I think this could be the picture of it but i'm not sure exactly what it is, maybe a capacitor to suppress noise?
you could try the forums on http://packardinfo.com/ im sure someone there would know.
Ah. Looks like an old-style "Molded Mica" Capacitor; I've seen them in old audio gear.
Some general info and more pictures here:
http://www.radiomuseum.org/forum/replacing_old_capacitors.html