Front of Martin Custom Shop 0-18K2 CFM IV Guitar image number 0
Back of Martin Custom Shop 0-18K2 CFM IV Guitar image number 1
Body of Martin Custom Shop 0-18K2 CFM IV Guitar image number 2
Headstock & Neck of Martin Custom Shop 0-18K2 CFM IV Guitar image number 3
Front of a Case for a Martin Guitar image number 4
Back of a Case for a Martin Guitar image number 5
Inside of a Case for a Martin Guitar image number 6
Front of Martin Custom Shop 0-18K2 CFM IV Guitar image number 1
Back of Martin Custom Shop 0-18K2 CFM IV Guitar image number 2
Body of Martin Custom Shop 0-18K2 CFM IV Guitar image number 3
Headstock & Neck of Martin Custom Shop 0-18K2 CFM IV Guitar image number 4
Front of a Case for a Martin Guitar image number 5
Back of a Case for a Martin Guitar image number 6
Inside of a Case for a Martin Guitar image number 7

One hundred years of lacquer, perfected. The Custom Shop 0-18K2 CFM IV pairs a vintage gloss finish with striking flamed koa and time-honored craftsmanship—a bold tribute to Martin innovation and the artistry beneath the surface. 

Specifications
What's Included
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At A Glance
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Description

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.

Specifications

Highlights

0-12 Fret body size
Flamed Koa back and sides
Flamed Koa top
GE Modified Low Oval neck with High-Performance Taper
1 3/4'' fingerboard width at nut
Hardshell case
Recommended Strings: Authentic Acoustic Lifespan® 2.0 Guitar Strings Phosphor Bronze - Light
Top Material: Flamed Koa
Finish Top: Vintage Gloss
Top Color: Clear
Top Inlay Material: Multi-Stripe
Top Detail: None
Binding: Black
Bridge Material: Ebony
Bridge Style: Straight Line - Drop in Saddle
Bridge String Spacing: 2 5/32"
Bridge Pin Material: Ebony
Bridge Pin Dots: None
Pickguard: None
Rosette: Old Style 18 Multi-Stripe
Saddle: Bone
Saddle Radius: 16"
Body Size: 0-12 Fret
Construction: Dovetail Neck Joint
Back Material: Flamed Koa
Side Material: Flamed Koa
Back and Side Finish: Vintage Gloss
Back and Sides Color: Natural
Back Detail: None
Side Detail: None
Back Purfling/Strip: Style 18
Back Inlay Material: None
Side Inlay Material: None
Bracing Pattern: X-Brace
Brace Shape: GE-Scalloped Hand Shaped
Brace Material: Spruce
Brace Size: 1/4"
Heelcap: Black
Endpiece: Black
Endpiece Inlay: None
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Neck Material: Select Hardwood
Neck Color: Natural
Finish Neck: Vintage Gloss
Scale Length: 24.9"
Number of Frets Total: 20
Neck Joins Body At: 12th 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 Material: Abalone
Fingerboard Binding Material: None
Side Dots: Antique White
Headstock Shape: Slotted with Round Slots and Square Taper
Headplate Material: Flamed Koa
Headplate Logo Style: Martin O'ahu® Script Overlay 
Headplate Binding Material: None
Tuning Machines: Golden Age Relic Brass
Knob: Cream Button
Nut Material: Bone
Case: Hardshell
Label: "100 Years of Lacquer" Paper Label Signed by CFM IV, Numbered in Sequence w/ Total (1 of, 2 of, etc.)
Electronics: None
Left Handed Availability: true
Pleked: true

What's Included

Custom Shop 0-18K2 CFM IV
Custom & Special Editions, 0-12 Fret, Acoustic
Authentic Acoustic Lifespan® 2.0 Guitar Strings Phosphor Bronze - Light
Pre-strung on instrument
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Hardshell Case
Hardshell Case
Brass or nickel plated hardware, Plush, Laminated wood shell

At A Glance

Body Shape & Volume

0-12 Fret

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Neck Shape

GE Modified Low Oval

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NEW FOR 2026

Custom Shop 0-18K2 CFM IV

Custom Shop 0-18K2 CFM IV

Custom & Special Editions, 0-12 Fret, Acoustic

$6,199.99
5 out of 5 Customer Rating

One hundred years of lacquer, perfected. The Custom Shop 0-18K2 CFM IV pairs a vintage gloss finish with striking flamed koa and time-honored craftsmanship—a bold tribute to Martin innovation and the artistry beneath the surface. 

Select Preferred Hand: Right

Custom Shop 0-18K2 CFM IV

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Specifications
What's Included
Description
At A Glance
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