Archived from the Tools In Action forum (Hand Tools). This thread is read-only.
I think that’s tthe part of smoothing plane. There are lots of videos on youtube, where described how to use it. It seems to be an old really. Not sure will it fit some modern or not. Just try.
It looks like that thing for smoothing sharp edges. I think my grandpa had one, haha
Have you tried search by Google pictures?
It looks like a grinder wheel dressing tool.