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JA6688, Gibson RB-3 Mastertone, 1930, EXF (playing wear on back of neck in area of the first five frets), professionally refretted (original frets in case pocket), original 5-string, original flat head, mahogany neck and resonator, leaves and bows fingerboard inlay, 20 hole flat head tone ring, one-piece flange, original friction 5th string peg included, has factory original arm rest activated internal mute assembly with original instruction sheet from Gibson in the case pocket, resonator neck notch inscribed "D Sinclair 10-1930, original redline hard shell case ...$135,000.00