Martin Custom Shop 28 Style OM Adirondack/Bastogne Walnut 3099738

Serial: 3099738

The Martin Custom Shop 28 Style OM Adirondack/Bastogne Walnut is a custom-built Orchestra Model that combines traditional Style 28 appointments with a distinctive selection of premium tonewoods and Golden Era-inspired construction. Specially configured for Tone Shop Guitars, this instrument features an Adirondack spruce top, premium Bastogne walnut back and sides, and hand-shaped Golden Era scalloped Adirondack spruce bracing. Its combination of a responsive spruce soundboard, richly figured walnut, and traditional dovetail neck construction creates an expressive acoustic guitar designed for exceptional articulation, dynamic range, and tonal complexity. Herringbone top purfling, select abalone inlays, antique white binding, and a polished ebony headplate complete a sophisticated interpretation of Martin's classic OM design.

The Adirondack spruce top is a defining feature of this Custom Shop instrument. Known for its strength, headroom, and responsiveness, Adirondack spruce provides a powerful tonal foundation that can accommodate everything from delicate fingerstyle playing to aggressive flatpicking. The top is supported by 1/4" Golden Era scalloped X-bracing, constructed from Adirondack spruce and individually hand-shaped to enhance the soundboard's responsiveness. Martin's Golden Era bracing approach allows the top to move freely while maintaining the structural support needed for a full, balanced acoustic voice. The combination of Adirondack spruce and carefully voiced bracing contributes to strong projection, clear note separation, and a broad dynamic range.

The back and sides are crafted from premium Bastogne walnut, a distinctive tonewood selected specifically for this Tone Shop Guitars Custom Shop build. Bastogne walnut is prized for its attractive grain patterns and tonal characteristics that balance warmth, clarity, and responsiveness. Its sound combines elements of the fundamental-focused character associated with mahogany and the harmonic complexity often found in rosewood, producing a balanced voice with articulate trebles, a present midrange, and controlled bass response. The two-piece walnut back features traditional Style 28-inspired appointments, including a zigzag backstrip and antique white binding. The natural beauty of the walnut is complemented by the gloss body finish, while the Adirondack spruce top features Martin's aging toner for a warm, vintage-inspired appearance.

The select hardwood neck features Martin's Golden Era Modified Low Oval profile with a High Performance Taper, combining traditional neck shaping with a comfortable, streamlined playing feel. Its 1 3/4" nut width provides generous string spacing for fingerstyle playing, while the 2 5/32" bridge string spacing offers precise control for intricate picking patterns and expressive chord work. The 25.4" scale length delivers the familiar tension and projection associated with Martin's OM platform, supporting a clear, articulate response across all six strings. A traditional dovetail neck joint provides a strong acoustic connection between the neck and body, while the adjustable truss rod allows precise neck relief adjustments. The satin neck finish offers a smooth playing surface, and the long diamond volute adds a traditional structural and visual detail.

The black ebony fingerboard features a 16" radius, 20 frets, and long-pattern Diamonds and Squares inlays crafted from select abalone. These elegant appointments reflect Martin's traditional Style 28 heritage while adding a distinctive Custom Shop touch. The solid headstock features a premium black ebony headplate with an inlaid C.F. Martin block logo in select abalone, providing a refined alternative to the standard headstock decal. Nickel Grover StaTite open-gear tuning machines with vintage-style buttons and an 18:1 gear ratio offer smooth, precise tuning adjustments. A bone nut and compensated bone saddle support clear string-to-string response, while the black ebony GE Modern Belly bridge provides a traditional connection between the strings and soundboard.

The visual appointments balance classic Martin styling with carefully selected Custom Shop details. Bold herringbone top purfling frames the Adirondack spruce soundboard, while a Style 28 Boltaron rosette surrounds the soundhole. Antique white body binding, a faux tortoise pickguard, and a traditional zigzag backstrip reinforce the guitar's vintage-inspired character. The bridge features bone pins with faux tortoise accents, matching the endpin for a cohesive appearance. A gloss body finish highlights the contrast between the aging-toner spruce top and richly colored Bastogne walnut back and sides, while the satin neck and polished ebony headplate provide a refined finishing touch. The instrument is entirely acoustic, with no onboard electronics, preserving its traditional construction and natural resonance.

Built by the Martin Custom Shop in Nazareth, Pennsylvania, this 28 Style OM represents a distinctive combination of premium tonewoods, Golden Era construction techniques, and custom appointments selected for Tone Shop Guitars. Its Adirondack spruce top, hand-shaped scalloped bracing, premium Bastogne walnut body, and comfortable Modified Low Oval neck make it a versatile choice for fingerstyle guitarists, flatpickers, and players seeking a responsive, articulate acoustic instrument. A five-ply hardshell case and Martin Custom Shop Credentials Book are included, completing an individually configured guitar that blends traditional Martin craftsmanship with a unique tonal and visual identity.

Highlights

• Tone Shop Guitars Custom Shop 28 Style OM with Adirondack spruce top and premium Bastogne walnut back and sides

• Hand-shaped Golden Era scalloped 1/4" Adirondack spruce X-bracing with traditional dovetail neck construction

• GE Modified Low Oval neck with High Performance Taper, 1 3/4" nut width, and 25.4" scale length

• Black ebony fingerboard with select abalone Diamonds and Squares inlays and matching abalone C.F. Martin block headstock logo

• Bold herringbone purfling, nickel Grover StaTite tuners, bone nut and saddle, five-ply hardshell case, and Custom Shop Credentials Book

Specifications

Body

• Brand: Martin

• Series: Custom Shop

• Model: Custom Shop 28 Style OM Adirondack/Bastogne Walnut

• Body Shape: 000/OM Auditorium

• Body Style: 14-Fret Orchestra Model

• Construction: Acoustic

• Top Material: Adirondack Spruce

• Top Grade: Grade 3–4

• Back Material: Premium Bastogne Walnut

• Side Material: Premium Bastogne Walnut

• Back Construction: Two-Piece

• Top Bracing Material: Adirondack Spruce

• Bracing Pattern: X-Bracing

• Bracing Pattern Number: 6-A OM

• Bracing Style: Golden Era with Hand Shaping

• Bracing Shape: Scalloped

• Bracing Size: 1/4"

• Back Bracing Material: Spruce

• Back Bracing Pattern: 000 14-Fret

• Center Strip: Spruce

• Body Depth: Standard

• Body Binding: Antique White

• Top Purfling: Bold Herringbone

• Back Purfling: Zigzag

• Back Inlay: Black/White/Black Boltaron

• Endpiece Material: Antique White

• Endpiece Inlay: White/White/Black Boltaron

• Rosette: Style 28 Boltaron

• Pickguard: Faux Tortoise, Pattern 82B

• Top Color: Aging Toner

• Body Finish: Gloss

• Cutaway: None

• Orientation: Right-Handed

Neck

• Neck Material: Select Hardwood

• Neck Profile: Golden Era Modified Low Oval

• Neck Taper: High Performance Taper

• Neck Joint: Traditional Dovetail

• Neck Finish: Satin

• Neck Stain: Mahogany

• Truss Rod: Adjustable, 14-Fret

• Fingerboard Material: Black Ebony

• Fingerboard Radius: 16"

• Fingerboard Width at Nut: 1 3/4"

• Fingerboard Width at 12th Fret: 2 1/8"

• Fingerboard Binding: None

• Fingerboard Inlays: Diamonds and Squares Long Pattern

• Inlay Material: Select Abalone

• Side Dots: White

• Number of Frets: 20

• Frets Clear of Body: 14

• Fret Wire: Standard

• Scale Length: 25.4"

• Compensated Scale Length: 25.470"

• Nut Material: Bone

• Nut Position: Angled

• Headstock Type: Solid

• Headstock Volute: Long Diamond

• Headstock Ears: Authentic

• Headstock Taper: Square

• Headplate Material: Premium Black Ebony

• Headplate Finish: Polished

• Headplate Inlay: C.F. Martin Block Logo

• Headplate Inlay Material: Select Abalone

• Headplate Binding: None

• Heelcap Material: Antique White

Hardware

• Bridge Material: Black Ebony

• Bridge Style: Golden Era Modern Belly

• Saddle Style: Drop-In

• Saddle Material: Compensated Bone

• Bridge Pins: Bone with Faux Tortoise

• Endpin: Bone with Faux Tortoise

• Tuning Machines: Grover V97-18NA StaTite

• Tuner Finish: Nickel

• Tuner Gear Ratio: 18:1

• Tuner Buttons: Vintage Style

• Nut Material: Bone

• Strings: Martin Authentic Acoustic Lifespan 2.0

• String Gauge: Light

• Strap Button: None

Electronics

• Electronics: None

• Pickup System: None

• Onboard Preamp: None

• Output Jack: None

Miscellaneous

• Serial Number: 3099738

• Manufacturer: C.F. Martin & Co.

• Build Type: Custom Shop

• Custom Configuration: C25-030805

• Custom Configuration Name: Tone Shop Guitars 28-Style OM Bastogne Walnut

• Style Inspiration: OM-28

• Custom Tonewood Selection: Bastogne Walnut #10

• Top Material: Adirondack Spruce

• Back and Sides: Premium Bastogne Walnut

• Bracing: Golden Era Hand-Shaped Scalloped Adirondack Spruce

• Number of Strings: 6

• Orientation: Right-Handed

• Country of Origin: United States

• Manufacturing Location: Nazareth, Pennsylvania

• Included Case: Martin Five-Ply Hardshell Case

• Included Documentation: Martin Custom Shop Credentials Book

Why Buy from Tone Shop Guitars?

Tone Shop Guitars is the premier Martin dealer in the Dallas-Fort Worth area — and beyond. Our staff are players and enthusiasts who know these instruments inside and out, and we hand-inspect every guitar before it leaves our doors. When you buy a Martin from us, you’re not just getting a great guitar — you’re getting the expertise, the care, and the follow-through that a purchase like this deserves. Stop by any of our three DFW locations or shop online with confidence. We’re here to help you find the right one.