This is a full Custom Martin all Mahogany 0-15S 12-fret slot head with 1-3/4" nut and 2-1/4" bridge spacing.

Below are just some of the specs of this custom:

MODELS: 0-15S Custom
CONSTRUCTION: Simple Dovetail Neck Joint
BODY SIZE: 0-12 Fret
TOP: Solid Genuine Mahogany
ROSETTE: Single Ring
TOP BRACING PATTERN: Custom
TOP BRACES: Solid Sitka Dtyl 1
BACK MATERIAL: Solid Genuine Mahogany
SIDE MATERIAL: Solid Genuine Mahogany
NECK SHAPE: Modified Low Oval
NUT MATERIAL: Bone
HEADSTOCK: Slotted
HEADPLATE: Solid East Indian Rosewood
FINGERBOARD MATERIAL: Ebony
SCALE LENGTH: 25.4''
# OF FRETS CLEAR:12
# OF FRETS TOTAL:20
FINGERBOARD WIDTH AT NUT: 1-3/4''
FINGERBOARD POSITION INLAYS: Diamonds & Squares - Short Pattern
FINISH BACK & SIDES: Satin
FINISH TOP: Satin
FINISH NECK: Satin
BRIDGE MATERIAL: Ebony
BRIDGE STYLE: Belly
BRIDGE STRING SPACING:2-1/4''
SADDLE:16'' Radius/Compensated/Bone
TUNING MACHINES: Grover Open-Geared w/ Butterbean Knobs
BRIDGE & END PINS: Solid Black Ebony
PICKGUARD: Delmar Tortoise Color

This guitar is in as-new condition with no isses at all, as is the Geib stye Martin case.