1958 Martin 00-18 in good condition.  100% original guitar with no changed parts or major repairs.  Top and back are crack free, there are two small repaired side cracks on the lower bout.  The bridge is uncut and original.  The original saddle has been taken down a slight amount but there is plenty of break angle with the action quite low (3/32" on bass side and 1/16" on treble).  The top appears to be Adirondack spruce instead of the usual Sitka, something that we see occasionally in the late 50s.  The tone is warm, clear and beautifully woody with air behind the sound.  A fine instrument.  The playability is wonderful with low action and a straight neck.  Includes hard case.