S maybe for the smokey model.
this note from Rainsong:
The new Smokey series offers all this in a minimal, blacked-out package that looks cool while being a bit more affordable than their other lines of guitars.
like this one:
http://www.tejonstreetmusic.com/p/ra...pro-element-1/
and I could be totally wrong................and it may just be satin finish.
interested to find out myself
d