Rickenbacker Rogan TV knob Black/Silver

Can't stress this enough!  These knobs about as hard to find as a Rickenbacker that won't Jangle!
Rogan TV set cooker knob. USA made by Rogan. New old stock. Fantastic condition. Most out there are brown with the gold diamond inset. These however are a even rarer black with silver inset. Large 1 5/16" base diameter and 1 1/2" from pointer end to set screw.  Same exact knob that John Lennon had on his Rickenbacker 325 in the early days.
Set of 4 pictured is what you get. All have a hex set screw included. All are for 1/4" diameter solid shaft pots.  
You may be looking for a set of brown ones, but I gotta say, this black/silver combo looks killer on a all black Rickenbackers guitars and other colors like Mapleglow and Blue Burst. Consider having what no body else has or will. These knobs are no longer made by the Rogan corporation.
Selling for a good cause.   Please feel free to ask questions.
Thanks!