Sig Sauer C3, .45 acp. cal. single action auto pistol.  Serial #GS36121.  Very good condition.  4 3/8" barrel has an excellent bore, fixed three sights.  98% stainless finish on the slide with light high edge wear and one spot on the left rear, likely from being in a holster.  98% black finish on the steel frame with a few small scratches.  Wood rough texture Sig grips are very good with a few light scratches.  Factory stainless magazine is in very good shape.  These are superb mid size pistols!