1840's Martin & Coupa Alternate X Braced Spanish Style
        Guitar
      
      
        
      This Martin has what I believe may be the first experimental variation of
      X-bracing,which appears at about the same time on a handful of Martins and
      Schmidt & Maul Guitars.  
      One such Schmidt& Maul is dated 1845.
      
      This example, which is quite close in size to a standard Size 2 Martin,
      also foreshadows a standard Martin Style 21, with simple, tasteful
      appointments including a herringbone 
      rosette and back strip and a top border consisting of simple light and
      dark lines.  The back is rosewood over mahogany veneer.
        
      
      
 
      
      
      
      Body width: 11 15/16"
      
      Upper body width:  8.5"
      
      Body length:  18 3/8"
      
      Upper body depth:  3 9/32"
      
      Lower body depth:  4 1/8"
      
      Neck width at nut: 1 29/32" 
      
      Neck width at 12th fret:  2 5/16"
      
      Soundhole:  3 9/16"
      
      Scale:  24.5"
      
      String spacing at bridge:  2 5/16"
      
      Top braces:  early experimental variation of X bracing with two outer
      blades of fan surrounding narrow X
      
      Back braces:  2 wide 1/2" V shaped, 1 half round, and one  6" x
      3/4" "floating" flat brace not extending to sides
      
      Stamp:  "C.F. Martin New-York" on 2 3/4" shield shaped Spanish foot
      
      Martin & Coupa label
      
      
      
      
      
 
      
      
       
      
      
      This guitar has another variation of the "floating back brace" seen on
      several of Martin's "Renaissance" guitars, which does not extend to the
      sides.
      
      
 
      
      
      
      Illustrated in Washburn & Johnston p. 36
      
      
      
 
      
      
      
      Illustrated in Carter, p. 18
      
      
      
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