Would someone know about that one? Looks like an Aria ProII Urchin U-60T (except mine has only two knobs), with the bridge and stop-bar of a U-100. Oh yes, another thing: She has a very short scale (about 21 in.)...
 
 
Seems to be a '83 model built by Matsu. Nothing on Matsu.org, unknown on all catalogs I had a look to (is there a chance some of the catalogs here contain that one?!).
You can see her at

