I came across a box of parts for antique woodworking at an estate. I will be listing all the pieces as auctions. Some things are well marked, other things I have to guess at. Please see my other listings. I will do my best to answer any questions.

This lot offers the 3 knobs as sown. One is marked Stanley Rule & Level Co. The others are not marked. One is cast iron. It is really thick and heavy. I found it with the other plane parts, but it may not be from a plane.
 
Please see all photos for details.

Thanks for looking!