I hear ya.
As a vivid member of matsumoku.org i at least have come to take notice of the current uncle mat fever that┬┤s seems to be on the rise.
Let┬┤s just say that in the recent year the asking prices of the genuine article seems to have gone up 100%.
Especially so with the Aria and Washburns.
We see more and more claims of given guitars to be made by matsumoku,and what makes it hard to distinct is that in some instances these claims are correct.
In short,by far of all Uncle Mats productions has yet been referenced.
Hence,you should to this day regard the pages of the library of matsumoku.org as guidelines more than anything else.
When it comes to the washies made by Yamaki and Matsumoku i for one at least think that some of them are downright world class,top notch gutars by any measure.To the point of pure custom shop stuff.
However,to determin what┬┤s Yamaki/Mat and what┬┤s not can sometimes be a harder than it looks,and it┬┤s IMO not really until you pick the axe apart and ontop of that carry a certain amount of knowledge of these guitars that things become certain and evident.
In the case of the HB above my answer on both counts would be no though.
Main reason is that the logo and headstock form can┬┤t be found on any of the other Yam/Mat Washies-right off the bat.http://www.matsumoku.org/models/washburn/catalogs/early_80s_fullline/80s_full_line_pg6_web.jpg.html
You can clearly see how these HBs share inlays,headstock form,hardware asf with the highend wings.