The Custom Shop D-18 brings top-shelf tonewoods and handcrafted Martin quality within easy reach. Built with solid genuine mahogany and an Adirondack spruce top, it delivers clear, punchy tone with powerful projection—perfect for flatpicking, strumming, and everything in between. Hand-shaped Golden Era scalloped forward-shifted bracing and a traditional dovetail neck joint give it vintage-inspired resonance and dynamic response, while faux tortoise binding adds a unique twist on Style 18 tradition. It’s a special addition to our lineup that offers the full Custom Shop experience—no design session required. Whether you're stepping up to your dream guitar or adding something truly inspiring to your collection, the Custom Shop D-18 proves that high-end craftsmanship doesn’t have to be hard to find.
Specifications
Highlights
Body Size: D-14 Fret
Back & Sides: Genuine Mahogany
Top: Adirondack Spruce with Aging Toner
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Nut Width: 1 3/4"
Case: Hardshell Case
Recommended Strings: Authentic Acoustic Lifespan® 2.0 Phosphor Bronze - Medium
Top
Top Material: Adirondack Spruce
Top Finish: Gloss
Top Color: Aging Toner
Top Inlay: Multi-Stripe
Top Detail: None
Binding: Faux Tortoise
Bridge Material: Ebony
Bridge Style: GE Modern Belly - Drop In Saddle
Bridge String Spacing: 2 5/32"
Bridge Pins: Black Plastic
Bridge Pin Dots: None
Pickguard: Faux Tortoise
Pickguard Inlay: None
Rosette: Old Style 18 Multi-Stripe
Saddle: Bone
Saddle Radius: 16"
Body
Body Size: D-14 Fret
Construction: Dovetail Neck Joint
Back Material: Genuine Mahogany
Side Material: Genuine Mahogany
Back & Side Finish: Gloss
Back & Sides Color: Dark Mahogany
Back Detail: None
Side Detail: None
Back Purfling/Strip: Style 18
Back Inlay: None
Side Inlay: None
Bracing Pattern: Forward-Shifted X-Brace
Brace Shape: GE-Scalloped Hand Shaped
Brace Material: Adirondack Spruce
Brace Size: 5/16"
Heelcap: Faux Tortoise
Endpiece: Faux Tortoise
Endpiece Inlay: None
Neck
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Neck Material: Select Hardwood
Neck Color: Dark Mahogany
Neck Finish: Satin
Scale Length: 25.4"
Frets: 20
Neck Joint: 14th Fret
Fingerboard Material: Ebony
Fingerboard Width at 12th Fret: 2 1/8"
Fingerboard Width at Nut: 1 3/4"
Fingerboard Inlay Style: Old Style 18
Fingerboard Inlay: Abalone
Fingerboard Binding: None
Side Dots: White
Headstock
Headstock Shape: Solid with Square Taper
Headplate Material: East Indian Rosewood
Headplate Logo: Authentic Style Script Overlay
Headplate Binding: None
Tuners: Nickel Open Gear
Knobs: Butterbean
Nut Material: Bone
Specifications
Highlights
Body Size: D-14 Fret
Back & Sides: Genuine Mahogany
Top: Adirondack Spruce with Aging Toner
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Nut Width: 1 3/4"
Case: Hardshell Case
Recommended Strings: Authentic Acoustic Lifespan® 2.0 Phosphor Bronze - Medium
Top
Top Material: Adirondack Spruce
Top Finish: Gloss
Top Color: Aging Toner
Top Inlay: Multi-Stripe
Top Detail: None
Binding: Faux Tortoise
Bridge Material: Ebony
Bridge Style: GE Modern Belly - Drop In Saddle
Bridge String Spacing: 2 5/32"
Bridge Pins: Black Plastic
Bridge Pin Dots: None
Pickguard: Faux Tortoise
Pickguard Inlay: None
Rosette: Old Style 18 Multi-Stripe
Saddle: Bone
Saddle Radius: 16"
Body
Body Size: D-14 Fret
Construction: Dovetail Neck Joint
Back Material: Genuine Mahogany
Side Material: Genuine Mahogany
Back & Side Finish: Gloss
Back & Sides Color: Dark Mahogany
Back Detail: None
Side Detail: None
Back Purfling/Strip: Style 18
Back Inlay: None
Side Inlay: None
Bracing Pattern: Forward-Shifted X-Brace
Brace Shape: GE-Scalloped Hand Shaped
Brace Material: Adirondack Spruce
Brace Size: 5/16"
Heelcap: Faux Tortoise
Endpiece: Faux Tortoise
Endpiece Inlay: None
Neck
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Neck Material: Select Hardwood
Neck Color: Dark Mahogany
Neck Finish: Satin
Scale Length: 25.4"
Frets: 20
Neck Joint: 14th Fret
Fingerboard Material: Ebony
Fingerboard Width at 12th Fret: 2 1/8"
Fingerboard Width at Nut: 1 3/4"
Fingerboard Inlay Style: Old Style 18
Fingerboard Inlay: Abalone
Fingerboard Binding: None
Side Dots: White
Headstock
Headstock Shape: Solid with Square Taper
Headplate Material: East Indian Rosewood
Headplate Logo: Authentic Style Script Overlay
Headplate Binding: None
Tuners: Nickel Open Gear
Knobs: Butterbean
Nut Material: Bone
