I have one of the early models, 1100's ser # Been back to SIG twice, a nice pocket gun when on my Harley.
I have a pocket holster locked into the chest pocket of my leather vest. While the Sig was in for repair I carried the R9, just put Hogue extreme grips on her with the black screws, I am amazed at the grip on my pup now what with Yankees mag extension and the new grips, its pretty good.
I did not realize that the extreme (rough grip edge) was all around the perimeter of the grip as well as the checkering in the middle,
I like!