BLISS™ 46-7339 for zenith knob
Fits our needle number 897 below.
Zenith part number 46-7339
A similar knob stamped with both part numbers 46-8325-32 & 46-7338-43 is an equal but blue substitute.
This is the knob that allows you to easily rotate the needle assembly. It is press-fit on the top of the metal shaft of part number "897-" seen below.
NOTE: This knob is obsolete but don't worry we are working on a solution. Please jump on the waiting list to be notified upon its release expected in 2019.