In 2002 I built an experimental Model 1 Sicilian with a modified bracing system. I designed this bracing to allow the full length of the soundboard to operate and withstand the string tension while permitting the free vibration necessary for tone and volume.

I showed it  to several guitarists, including Martin Simpson. Not only did they approve, it was clearly different enough to be considered a model in its own right. Martin and I decided to introduce it as the Martin Simpson Signature model.
I built more prototypes, Martin played them, and we both listened. We talked about the changes in sound and how we wanted to take them further, and ended up with not just different bracing, but also a new body shape.
The new guitar had the same overall length and width as my Model 1, but a wider upper bout and a larger lower bout. It was a little deeper, had a 650mm (25.6") scale, an asymmetric bridge with split saddle, ebony binding with birdsfoot, and striking red and white purfling.

Martin took delivery of the first MS signature model in September 2003. It became his main concert guitar.

In 2005 I built a new MS model with modified bracing. This became the Mark 2 MS signature model. Martin now plays it alongside his Mk 1.

Specifications Soundboard: European, Adirondack or Italian spruce Back and sides: Brazilian rosewood, African Blackwood, or Madagascar rosewood Neck: Cuban mahogany or Madagascar rosewood Fingerboard: Ebony Bridge: Ebony with two piece bone saddle Binding: Ebony with red and white purfling Trim: Birdsfoot edging with red and white purfling Body Width: 16.3" (415 mm) Body Length: 495mm (19.5”) Max body depth: 120mm (4.74”) F/b width at nut: 1.75" (45 mm) Scale: 650mm = 25.6”

    Martin with his original MS Signature Model