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Preston Thompson OM-MA Adirondack/Mahogany Acoustic #1769  From Preston Thompson

A refined take on a classic design from Preston Thompson!

Preston Thompson Guitars

Available for Special Order

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Because of our special relationship with Preston Thompson we can get this as fast, or faster than anyone in the industry. In some cases, we even have preferred build slots we can offer you.

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What We Think

A warm and articulate pairing of Adirondack Spruce and Mahogany makes this OM a true joy to play. Balance, sensitivity and comfort abound thanks to the perfect shaping and smaller body size while maintaining plenty of power and presence. Aesthetically rich with the construction and build quality we've come to love and expect from each and every Preston Thompson guitar, what a combination!

Manufacturer's Description from Preston Thompson

Preston Thompson OM and 14 fret 000 guitars look just about identical and share many similar qualities, including superb responsiveness and a lovely sweetness in tone. The relatively slimmer body depth gives players a quickness to the sound delivered while also delivering the string to string and bass to treble balance these models are renowned for.

The difference between an OM and the 14 fret 000 is scale length. The OM (Orchestra Model) has a longer 25.4” scale length, the same scale length as dreadnought guitars. The 14 fret 000 has the shorter 24.9” scale length. This subtle difference accounts for the unique qualities of each model. The longer OM scale length generally gives these instruments a little more punch and volume, making the OM perfect for players that both flat pick and fingerpick. The 14 Fret 000, with its shorter scale length, is perfect for finger style pickers and blues players. Because the string tension is slightly less, certain techniques like bending strings and blues style riffs are often enhanced.  The florentine cutaway is also offered for both the OM and the 000 14 Fret.

Preston Thompson Guitars

About Manufacturer

From our workshop in the music-loving town of Sisters, Oregon we build custom guitars and standard models based on the best American made guitars from the 1930s. The choice of Grammy-winning flatpick and fingerstyle guitarists alike, Preston Thompson Guitars are among the best acoustic guitars available anywhere, renowned for superior tone, craftsmanship and materials.

Our fine guitars are designed by master guitar luthier, Preston Thompson. Discovered by bluegrass virtuosos Charles Sawtelle and Peter Rowan in the 1980s, Preston has built a reputation for handmade, original vintage style guitars based closely on the measurements and sound quality of those golden era steel string guitars. He got his start building guitars under Charles Fox at the School of the Guitar Research & Design Center in Vermont, one of the first schools for guitar making in North America.

It was during his collaboration with bluegrass great Charles Sawtelle of Hot Rize, that Preston began to gather measurements from Sawtelle’s collection of rare and famous pre-war vintage instruments.

The guitar Preston built for Sawtelle based on these studies became one of his most treasured instruments. And Preston uses his detailed measurements of those instruments to this day to create guitars that are coveted for their superlative sound, the beauty of their materials, and the precision of their construction.


Model: OM-MA

Serial: 1769

Top: Adirondack Spruce

Back/Sides: Mahogany

Binding: Tortoise

Top Purfling: Rope Binding

Back Purfling: None

Side Purfling: None

Soundhole: 3 7/8"

Rosette: 18 Style 3 Ring

Back Strip: Rope Backstrip

Tail Wedge: Tortoise

Top Bracing Pattern: Advanced X Adirondack

Top Bracing: Pre-War Scalloped

Back Bracing: Adirondack Spruce

Tongue Brace: Yes

Neck Material: Mahogany

Truss Rod: Single Action 14-Fret

Peghead Overlay: Figured Ebony 

Peghead Logo: Thompson MOP

Custom Inlay: None

Headstock Binding: None

Headstock Type: Solid

Neck Binding: None

Volute: None

Nut Width: 1 3/4"

Width @ 12th Fret: 2 1/4"

String Spacing: 2 5/16"

Neck Thickness: .860"

Neck Profile: Soft V

Heel Cap: Tortoise

Neck Finish: Vintage Brown Mahogany

Top Finish: Toner

Back/Sides Finish: Natural Gloss

Fingerboard Material: Ebony

Bridge Material: Ebony

Sunburst: Toner

Fingerboard Style: 18 Style

Fingerboard Bindings: None

Fingerboard Inlay: Old Style 18 Dots

Inlay Material: Abalone

Scale: 25.4"

Side Position Markers: 2mm Dots

Side Position Material: White MOP

End/Bridge Pin Type: Ebony

Strap Button: Optional

Bridge Type: Ebony Belly Drop-In

Tuning Machines: Waverly Nickel w/Butter Bean Buttons

Nut Material: Bone

Saddle Material/Style: Bone Compensated

Pickguard: OM-Tortoise

Fret Wire: Standard Nickel Silver

Case: Harptone

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