As usual, a Custom Martin based on your suggestions, this one is an 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 Mahogany
ROSETTE: Single Ring
TOP BRACING PATTERN: Custom
TOP BRACES: Solid Sitka
BACK MATERIAL: Solid Mahogany
SIDE MATERIAL: Solid Mahogany
NECK SHAPE: Modified Low Oval
NUT MATERIAL: Bone
HEADSTOCK: Slotted
HEADPLATE: Solid East Indian Rosewood
FINGERBOARD MATERIAL: Rosewood
SCALE LENGTH: 24.9''
# 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: Rosewood
BRIDGE STYLE: Belly
BRIDGE STRING SPACING:2-1/4''
SADDLE:16'' Radius/Compensated/Bone
TUNING MACHINES: Nickel Open-Geared w/ Butterbean Knobs
BRIDGE & END PINS: Solid Black Ebony
PICKGUARD: Delmar Tortoise Color