Hark the herald angels have sung, and it sounded just like this delightful 0-18 from the year 19 and 57. The smallest of the 0 shaped guitars from Martin, it won't put a foot wrong with it's soft voice and well rounded, midrange forward sound. 

Very clean. Minor binding de-lamination at the waist on the back, it looks to be stable. Looking at the frets we think these have been replaced. This guitar definitely has the vibey 'wow' factor and is looking for a new home.