Identify this concept!

[jonbailie]

I'm having little trouble finding out which concept this is. If anyone can identify this for me I'd be super happy.

I'm rebuilding it for a friend, but he doesn't know which exact model it is, or size for that matter (Im guessing a 50, based on it's size next to my 600) It needs a few parts, which I'm also having a hard time finding, but maybe I can find something here. If anyone can identify this concept, if it is indeed a concept, I'd greatly appreciate it, and perhaps you can point me in the direction of finding some used parts. Thanks for taking the time to look... really appreciate it

Here's a few photos, plus a comparison of size by my Trex 600 pro (click for a larger image):

















Again, thanks for the time

[hirobowen]

That's not a concept it's a Nexus 30 from the late 90's.