RE: C

When I purchased my Sigma SDR-28C in 1989 I was told that the S was for Solid, the DR was for Dread-Rosewood with rosewood sides and the C was for Cedar top. I could be wrong, but mine does look more like cedar and sounds much more mellow that a spruce top.

Odd to put cedar on a dreadknot, but I believe this to be true.

I am very happy with mine after 20 years. It is nowhere near the HD-28 LSV we also have in the house in terms of sound, but far beyond any sound that I have gotten from any guitar for less that $2000.