What is this ARM?

I think Lloydc is right. Here is a link to info about the Pierre Lurne arm, including a link to an owner's manual (in French!):

http://www.vinylengine.com/library_model.php?make=Audiomeca%20/%20Pierre%20Lurne&selected_model=Arm%202

04-25-07: Lloydc
The glass base it sits on says, “Premier Oracle Reference BRAS Pierre Lurne”. “Bras” is French for “arm”, so is it a “Pierre Lurne” tonearm?

Did you use image enhancement to read that?

A little quick Googling for Pierre Lurne revealed that he designed the linear tracking arm for the Goldmund, and that this particular model is the Audioeca/Pierre Lurne Arm 2, illustrated and briefly described here:

http://www.vinylengine.com/library_model.php?make=Audiomeca%20/%20Pierre%20Lurne&selected_model=Arm%202

There's some good news and bad news: You can download the tonearm manual from that website, but it's in French.

looks a little like the Magnepan Unitrac.

Cwlondon, I am dating myself, no?. I had my doubts.

The proper answer certainly appears to be that from Jb53.

Softmachine, if you have problems with the French, let me know and I will interpret those portions that give you trouble. It would appear that you can garner a lot of useful info solely from the schematics provided in the instructions.