Yes - the old style that we all grew up with that telescoped from the fender!
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My .02 - do NOT put juice to it.
The peeling chrome tells of long term moisture, plus those capacitors have a near zero chance of working.
However, if you insist on making it live again, it sounds like a wonderful candidate for complete restoration.
putting voltage to that radio may put it in its grave
If you do decide to power it I believe that you'll find that the Packard wiring system was a positive ground system.
No decissions yet. Waiting to see if anyone wants it that's got a Packard to put it in. If they do it's theirs for shipping and my cost.