This our Martin CS-OM-18 Custom Shop OM-18 featuring gorgeous Sinker Mahogany bck and sides with Premium VTS Sitka Spruce Soundboard.

Full specs are as follows:

MODEL CS OM-18
CONSTRUCTION: Mahogany Blocks/Dovetail Neck Joint
BODY SIZE: 000-14 Fret
TOP: Solid Sitka Spruce VTS Premium
ROSETTE: Style 28
TOP BRACING PATTERN: Standard ''X'' Scalloped
TOP BRACES: Solid Sitka Spruce 1/4''
BACK MATERIAL: Solid Sinker Mahogany
BACK PURFLING: Style 18
SIDE MATERIAL: Solid Sinker Mahogany
ENDPIECE: Tortoise
ENDPIECE INLAY: none
BINDING: Tortoise
TOP INLAY STYLE: .070 B/W/B/W/W/B
SIDE INLAY: none
BACK INLAY: none
NECK MATERIAL: Genuine Mahogany 
NECK SHAPE: Modified Low Oval Profile w/ Performing Artist Taper
NUT MATERIAL: Bone
HEADSTOCK: Solid/Square Taper
HEADPLATE: Solid East Indian Rosewood
HEELCAP: Solid East Indian Rosewood
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: 2-1/8''
FINGERBOARD POSITION INLAYS: None
FINGERBOARD BINDING: none
FINISH BACK & SIDES: Non Catlyzed Gloss
FINISH TOP: Non Catlyzed Gloss
FINISH NECK: Satin
BRIDGE MATERIAL: Solid Black Ebony
BRIDGE STYLE: 1930s Style Belly w/ Drop-In Saddle
BRIDGE STRING SPACING: 2-3/16''
SADDLE: 16'' Radius/Compensated/Bone
TUNING MACHINES: Gotoh Nickel Open-Geared w/ Butterbean Knobs
RECOMMENDED STRINGS: Martin Studio Performance Lifespan Phosphor Broze Light Gauge (MSP7100)
BRIDGE & END PINS: Black w/ White Dots
PICKGUARD: Delmar Tortoise Color
CASE: 533E Geib Hardshell
INTERIOR LABEL: none