My copy of this tune is on vinyl Jeepman and almost unplayable. From what I can remember, it is some sort of open tuning,though I'm not sure which one. And I can also recall that it is a fairly difficult song to play as Mr. Bromberg does it.

I realize this doesn't help you much but nobody was answering so I thought I'd at least respond with what I have in my memory. If I can find another copy or play my old one I'll take a shot at finding the tuning at least.

Clifton53