Can any of you bowlback experts identify this mandolin for me? It seems to have irises inlaid up the neck. Pretty. Lots of crazing in the finish, and a few tiny cracks in the fretboard, and a bit of fret wear, but the neck is straight, the action is excellent, the volume is loud, the tone is rich and sweet, there are no cracks that I can find in the top or back. Definitely one of the good ones. No label. Inside of bowl is lined entirely with what looks like tar-covered muslin. (How can it have such a lively tone with that stuff in there?) I would guess that this is an upper end Washburn or Lyon & Healy, but maybe someone can tell me a lot more. Thanks very much for your help.