Here is a Rieker’s Beer Ball Knob from the Penn-Star Brewing Company located in Lancaster, PA. This Rieker’s Beer Ball Knob is from the between 1935 to 1938 and is in excellent condition for its age.
There is another variation of this Rieker’s Beer Tap Knob with the colors of the face in reverse with maroon lettering and a copper background. I am actively looking for that variation to add to my collection; please contact me if you have one and are interested in selling it.