Its a turret tuner so you can hold a big eraser on the little
dots that are the contacts. While doing so make a
bunch of full turns on the tuner. Often thats all you need to
do. DO NOT get near the UHF section, its the part with
the gang tuning cap.
P-B made some nice sets but in latter years relabeled GE
sets. Also saw some Panasonic mid level audio with
there name. Real P-B's quite rare sets in New England.
73 Zeno