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Martin 1931 C-2 Conversion Acoustic Guitar, Brazilian Rosewood & Red Spruce - Pre-Owned

$12,250.00

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There is a little bit of hidden magic within every Martin C-2 conversion, and this 1931 example exhibits the sought after tonality that only comes from a C-2 conversion done right.  The C-2 was originally a roundhole archtop  hybrid design produced by Martin in the early 1930s containing a carved arched top, paired with the back and sides of a flattop. The model never quite rose to prominence due to the tonal nature of its construction. Without the punch and power of a guitar with a carved back, and lacking the sustain and warmth of a flattop instrument, the C-2 was quickly forgotten about when Martin discontinued their archtop models during World War II.

It takes a skilled luthier to perform a proper C-2 conversion, ultimately converting the guitar into an OM-28. Due to the inherent design of its archtop origins, the neck is set at a steep angle to accommodate the carved top and tall bridge. In order to achieve a shallower neck angle, the part of the heel that joins the body must be fully reshaped. As a result, the fingerboard is shifted up towards the body a bit causing the neck to intersect the body between the 13th and 14th fret. Consequently, the bridge is repositioned slightly further from the soundhole than it would be on a conventional OM. As a result, these guitars are able to be intonated to a degree that surpasses the abilities of an original 1930s Martin guitar. 

The beautiful original Brazilian Rosewood back and sides of this C-2 were outfitted with a Red Spruce top, and an ebony belly-style bridge with a cut-through bone saddle.  The resulting instrument is an incredible one-of-a-kind OM-style Martin that predominately pre-dates World War II, yet can be purchased at a fraction of the cost of an original OM. This Martin C-2 Conversion has taken on a new life with a voice that is all its own, and it’s ready for countless more decades of making music.  


  • Year: 1931
  • Top: Red Spruce 
  • Back & Sides: Brazilian Rosewood 
  • Rosette: 28 Style 
  • Purfling: Herringbone 
  • Backstrip: Zig Zag
  • Body Binding: Cream 
  • Neck: Mahogany 
  • Neck Profile: V 
  • Fretboard Wood: Ebony 
  • Peg Head Style: Standard 
  • Peg Head Veneer: Rosewood 
  • Fretboard Binding: None 
  • Fretboard Inlays: MOP Slotted Diamond 
  • Tuners: Grover Open Back 
  • Bridge: Ebony 
  • Pins: Bone, Black Dot 
  • Saddle Material: Bone
  • Saddle Type: Cut-through 
  • Nut Material: Bone 
  • Pickguard: Tortoise 
  • Nut Width: 1 11/16”
  • Spacing at Saddle: 2 1/4” 
  • Scale Length: 25 3/8” 
  • Body Depth: 4 1/8”
  • Body Length: 19 1/4” 
  • Upper Bout: 11 3/16”
  • Lower Bout: 15” 
  • Truss Rod: Non Adjustable 
  • Brace Pattern: Scalloped X-Brace
  • S/N: 48427
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