Allen &
Bristle Spline Wrenches
These wrenches are the most common used to remove the
knobs from the radios. There is no way to know for sure which
wrench will work for a particular radio. Since these older units
could have been in the shop multiple times and the knobs and/or
the set screws could have been swapped from a different radio, making it
only a guess as to which wrench to use.