Thanks for posting the photo of your 1C heavy duty head with the quill feed. I see you have the overarm adapter / double swivel adapter, very nice. Is your mill a H/V or a 1C ? Do you have the out/in board support for horizontal work ? What are the parts on the front and on the left that look the same? The one on the front is in the middle of the mounting nuts.
The quill head is actually on a 2MI Universal, but I beleive it is the exact same head as you could get on the Toolmaster. The extras on the head are Starrett levels. They don't appear in any literature I have, but I'm sure they are original. I do have an H/V, complete with double swivel and arbor support. I also have a 1D with a shaping attachment. And, a Cinel 202-12, which is basically an H/V with a 2MI knee.