Identify 1/8"x19" rod. Button one end & "L" bend on other. 1 1/2" sliding knurled part w/set screw.

[Guest Bill3rd]

This is an old auto part that turned up when we sold the family operation in 1985 that had been in business from about WW1.

I have posted 4 photos with text on the photos. Hope you can help.

Thanks