ID help needed for these chairs, Halabala??  

Try reverse cantilever chrome plated tubular steel Ralph Rye chair for Dunbar.
I have 3 of the above chair and after exhaustive research I found out years ago through this forum.

Thanks for the tip, I've looked at those, but the arm kind of loops around on the Dunbar. Are there any serious cantilever chair enthusiasts out there? There is a book, 2100 metal tubular chairs by Otakar Macel, anyone own it?

i own the book and already chekked yours isn't in it
although there is a thonet a bit close
and two "brothers"
maarten