04-10-2014, 03:26 PM
I am not sure what you mean by bottom knob. Are you referring to the 2 part handle or just the end of the threaded insert? Two part handles were common then. It is a poor design. When the handle is over tightened it causes the outer cylinder to crack. It is rare to find one that is not cracked. If you mean is there a cap over the end of the threaded insert, that I have not seen before.
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