1927 Martin T-17 Tiple in excellent condition.  The tiple is an member of the ukulele family.  Usually tuned GCEA four course ten strings.  The G has an octave, the C E have an octave string on either side and the A is a unison pair.  The T-17 model is all mahogany body with fan bracing.  Fingerboard and bridge are Brazilian rosewood.  This little guy is 100% original and crack and repair free.  If you are wondering what these things are for I highly recommend checking out Blake Mills.  Includes original hard case with corduroy lining.