Martin Custom Shop 18 Style D-12F Acoustic Guitar with Hardshell Case - Used

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This used 3.8 lb Martin will ship insured, fully set up, and inspected from Rapid City, SD. In excellent condition, this guitar has a few chips on the headstock.

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The Martin Custom Shop 18 Style D-12F is the kind of guitar that immediately feels special before you even play the first chord. Built through Martin’s Custom Shop, this instrument blends vintage-inspired design choices with subtle custom details that make it stand apart from standard production models. It carries the soul of a pre-war style Martin while introducing a unique Custom “D” dreadnought paired with a 12-fret neck configuration, creating a guitar that feels deeply rooted in old-school acoustic tradition yet uniquely its own. This is the sort of build Martin enthusiasts search for—the familiar warmth of an 18-style instrument with thoughtful custom-shop personality throughout.

The custom dreadnought body combined with the 12-fret design gives this guitar a completely different feel and response than a traditional 14-fret dreadnought. The shifted bridge placement and increased body resonance create a fuller, more open low end with rich sustain and a warm, blooming midrange that fills a room effortlessly. It still has the power and projection players expect from a Martin dreadnought, but with a softer, more vintage-style response that feels incredibly alive under the hands. Fingerpicked passages sound huge and detailed, while strummed chords carry a thick, woody authority that never becomes harsh.

Its tonewood combination is classic for a reason. The certified European spruce top offers exceptional responsiveness, clarity, and dynamic range, paired beautifully with mahogany back and sides that add warmth, dryness, and focused midrange character. Finished in a rich aging toner gloss, the top carries the look of a well-loved vintage Martin right out of the case. Black ebony for the fingerboard and bridge adds crisp articulation and elegant contrast against the mahogany neck and body, while the black binding, tortoise pickguard, and black backstrip reinforce the understated sophistication of the old Style 18 aesthetic.

The details throughout this Custom Shop build feel intentionally vintage-inspired without becoming flashy. Old Style 18 inlays, the old-style gold decal headstock logo, butterbean Gotoh open-gear tuners, GE Modern Belly bridge, and satin-finished genuine mahogany neck all contribute to a guitar that feels timeless and authentic. The GE Modified Low Oval neck with High Performance taper keeps the playability modern and comfortable despite the vintage design language, making this an instrument equally suited for serious players, collectors, and lifelong Martin fans. Rich, resonant, and unmistakably handcrafted, the Custom Shop 18 Style D-12F captures the magic of Martin’s golden-era designs in a truly distinctive package.

Features / Specs

Highlights

• Orientation: Right-Handed
• Electronics: None
• Bracing: Spruce X-Bracing
• Cutaway: None

Body

• Body Shape: Custom "D" Dreadnought
• Top Material: Certified European Spruce
• Top Finish: Gloss
• Top Color: Aging Toner
• Back & Sides Material: Mahogany
• Back Configuration: 2-Piece with Black Backstrip
• Back & Sides Finish: Gloss
• Bracing: Spruce X-Bracing
• Binding Material: Black
• Rosette: Old Style 18 Boltaron

Neck

• Neck Profile: GE Modified Low Oval
• Neck Material: 12/4 Genuine Mahogany
• Neck Taper: High Performance Taper
• Neck Depth: 0.814" at 1st Fret, 0.916" at 9th Fret
• Scale Length: 25.4"
• Nut Width: 1-3/4"
• Fingerboard Material: Black Ebony
• Fingerboard Inlay: Old Style 18
• Fingerboard Binding: None
• Fingerboard Radius: 16"
• Fingerboard Spacing: 2-5/32"
• Neck Finish: Satin
• Neck Joint: Dovetail
• Headstock Veneer: East Indian Rosewood 
• Headstock Taper: Square
• Headstock Binding: None
• Headplate Inlay: None, Old Style Gold Decal
• Headplate Finish: Satin

Hardware

• Bridge Style: GE Modern Belly
• Bridge Material: Black Ebony
• Bridge Pins: Ebony
• Saddle: Compensated Bone
• Nut Material: Bone
• Tuners: Gotoh Nickel SE770E-06M-XN Open Gear with Butterbean Knobs
• Pickguard: Tortoise

Miscellaneous

• Electronics: None
• Case/Gig Bag: Hardshell Case
• Serial Number: 3011499
• Manufacture Date: 2025