Cat Taken with a vintage lens

When I first received the Pentax K-S1, I was ready with four vintage lenses with the Pentax K-Mount. I'm looking for my notes on which manufacturer's lens was used, but the focal length was 50mm.  These two photographs were some of the first I took with the camera.  I'm impressed.  I believe the setting was just B&W, not bold monochrome, since the blacks were not crushed.  ISO was set to 1600 and the shutter speed was 1/125-sec.