Atwater 55 question

[funken]

I picked up my Atwater model 55. Just a couple of questions.
There are 3 knoms on the front of the set. One controls the volume, one is the dial selector. What is the third knob?
What is the best antenna for this set. Currently there's an insulated wire serving as the antenna.

I'm very pleased with my purchase. The cabinet is in great shape and the set works. I KNOW I SHOULD'NT have tried turning the set on but the owners beat me to it.


Have a great weekend!

Funken