[Arran]

The Sealedtite capacitors or those molded wax ones with the blue label that says "Solar" on them. They don't actually use a cardboard shell like a typical old capacitor, they were made out of molded wax with a thin paper label. They are not original to the radio though, most of the ones I have seen were used new in radios and TVs of the 1940s and 50s, and as replacements, the older Solar brand caps did use the more normal cardboard shells. Unlike most old paper caps they are one of the few that still tests good most of the time, well sort of good in that a 600 vdc cap will work up to 400 vdc, but you still don't want to trust them.
Regards
Arran

P.S I don't think that headset jack belongs there.