D1-4 spindle nose. Not sure how it would attach or what else it could be.
I took some pics of how I found it and came up with some stuff that may help ID things.......or not. Appreciate the help regardless. Don't know how to resize pics so will go with thumbnails. Not sure that will help. I'm not an IT rocket scientist thats for sure.
I was wrong #3 is attached and is not 2 pieces so the cylinder being held by that is probable
The first pic is just of the tool post grinder no big deal
next is the angle gauge for the taper ?
Third is the same tools from a different angle or position
Forth is how I found the Lathe, except now I understand the "clamp" after looking at yours. I have no idea how to use it but with time.....
The next one is 2 tools showing where they must attach just behind them in the photo. The alignment pins and the bolts holes are a perfect match
The last one is showing 2 tools that must work together as they appear to be the same height. I didn;t put them on yet but may do later.
I need to get over to my neighbors place and pick up some more tooling. There may be a piece of the puzzle yet over there.