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A century ago, Martin changed the way its guitars were finished—embracing lacquer and setting a new standard for durability, beauty, and quality. The Custom Shop 0-18K2 CFM IV celebrates that milestone with a vintage gloss finish closely based on what Martin introduced in 1926—capturing the depth, warmth, and luster of those early instruments while reflecting the precision of today’s craft. Built with a striking solid flamed koa body—an homage to the Concert-sized all-koa models that were the first to be sprayed with this lacquer finish—it blends tradition and innovation in every detail. From hand-shaped bracing to time-honored construction, it carries forward the same level of craftsmanship that defined Martin in the early twentieth century—and continues to shape it today. Limited to just 100 instruments, it’s not only a tribute to 100 years of lacquer, but to the enduring artistry beneath it.

Highlights0-12 Fret body sizeFlamed Koa back and sidesFlamed Koa topGE Modified Low Oval neck with High-Performance Taper1 3/4'' fingerboard width at nutHardshell caseRecommended Strings: Authentic Acoustic Lifespan® 2.0 Guitar Strings Phosphor Bronze

Top Material: Flamed KoaFinish Top: Vintage GlossTop Color: ClearTop Inlay Material: Multi-StripeTop Detail: NoneBinding: BlackBridge Material: EbonyBridge Style: Straight Line - Drop in SaddleBridge String Spacing: 2 5/32"Bridge Pin Material: EbonyBridge Pin Dots: NonePickguard: NoneRosette: Old Style 18 Multi-StripeSaddle: BoneSaddle Radius: 16"

Body Size: 0-12 FretConstruction: Dovetail Neck JointBack Material: Flamed KoaSide Material: Flamed KoaBack and Side Finish: Vintage GlossBack and Sides Color: NaturalBack Detail: NoneSide Detail: NoneBack Purfling/Strip: Style 18Back Inlay Material: NoneSide Inlay Material: NoneBracing Pattern: X-BraceBrace Shape: GE-Scalloped Hand ShapedBrace Material: SpruceBrace Size: 1/4"Endpiece: BlackEndpiece Inlay: None

Neck Shape: GE Modified Low OvalNeck Taper: High-Performance TaperNeck Material: Select HardwoodNeck Color: NaturalFinish Neck: Vintage GlossScale Length: 24.9"Number of Frets Total: 20Neck Joins Body At: 12th FretHeelcap: BlackFingerboard Material: EbonyFingerboard Width at 12th Fret: 2 1/8''Fingerboard Width at Nut: 1 3/4''Fingerboard Inlay Style: Old Style 18Fingerboard Inlay Material: AbaloneFingerboard Binding Material: NoneSide Dots: Antique White

Headstock Shape: Slotted with Round Slots and Square TaperHeadplate Material: Flamed KoaHeadplate Logo Style: Martin O'ahu® Script Overlay Headplate Binding Material: NoneTuning Machines: Golden Age Relic BrassKnob: Cream ButtonNut Material: Bone

Case: HardshellLabel: "100 Years of Lacquer" Paper Label with Pre-Printed CFM IV Signature, Numbered in Sequence w/ Total (1 of, 2 of, etc.)Electronics: NoneLeft Handed Availability: truePleked: true