Martin D-18 Authentic in excellent condition with only a minor indentation in the top keeping it from being listed as mint.

Full specs are as follows:

MODEL: D-18 Authentic 1937
CONSTRUCTION:Mahogany Blocks/Dovetail Neck Joint
BODY SIZE:D-14 Fret
TOP:Solid Adirondack Spruce
ROSETTE:Old Style 18
TOP BRACING PATTERN:Standard ''X'' Scalloped (Authentic Style), Forward Shifted
TOP BRACES:Solid Adirondack Spruce 5/16''
BACK MATERIAL:Solid Genuine Mahogany
BACK PURFLING: Solid Brazilian Rosewood Strip
SIDE MATERIAL: Solid Genuine Mahogany
ENDPIECE:Delmar Tortoise Color in a Narrow 1937 Shape - Brown
BINDING:Black Boltaron
TOP INLAY STYLE: Multiple Black/White Boltaron
NECK MATERIAL: Genuine Mahogany
NECK SHAPE: Authentic 1937 Barrel & Heel
NUT MATERIAL:Fossilized Ivory
HEADSTOCK:Solid/Square Taper
HEADPLATE:Solid Brazilian Rosewood /Large Golden Era Style
HEELCAP:Solid Black Ebony
FINGERBOARD MATERIAL: Solid Black Ebony
SCALE LENGTH: 25.4''
# OF FRETS CLEAR:14
# OF FRETS TOTAL:20
FINGERBOARD WIDTH AT NUT:1-3/4''
FINGERBOARD WIDTH AT 12TH FRET:2-1/4''
FINGERBOARD POSITION INLAYS:Old Style 18
FINGERBOARD BINDING:none
FINISH BACK & SIDES: Polished Gloss
FINISH TOP:Polished Gloss w/ Aging Toner 
FINISH NECK:Polished Gloss
BRIDGE MATERIAL:Solid Black Ebony
BRIDGE STYLE:1930s Style Belly w/ Long Saddle
BRIDGE STRING SPACING:2-5/16''
SADDLE:16'' Radius/Long Fossilized Ivory
TUNING MACHINES:Waverly Nickel w/ Oval Buttons
RECOMMENDED STRINGS:Martin Medium Phosphor Bronze (M550)
BRIDGE & END PINS: Solid Black Ebony
PICKGUARD:Delmar Tortoise Color - Beveled (Under Finish)
CASE:V18A Authentic style