Here for sale is a vintage National Triolian. These guitars were made in small numbers in 1920's and 1930's. and few have survived in such good condition without damage or tears to the metal body. The tone from this old metal body is haunting. This instrument appears all original except that it has been re-fretted with modern style frets that are much easier to navigate than the original box style frets. The guitar is in good playing condition with a straight neck and action right in the sweet spot where you can both play slide and fret it with your fingers. Comes with TKL newer Hard case. Photos tell the story. Feel free to ask questions.