マーチン　ウクレレ
Ukuleles

Concert ukes are a bit larger than standard ukes.

The scale of the concert uke is an inch longer and the body is deeper than a standard.
The lower picture is the period GEIB case and a set of Bruno gut strings
came with this concert uke. It seems this uke was made in the 40-50s

Oliver Ditson co. Ukelele by C.F.Martin & co. c.1930