If you are inferring the gun sold might be what the seller said it was, there are two things that make it a K frame. First, compare the cylinder flutes. I frame 32s flutes have an almost pointed rear section while K frames are a perfect half-circle. Second, the sold gun has a square butt, I frame Regulation Police in the 677,000 serial number range and early Model 31s have heavily rounded toes, both front and rear. Lastly, the did not have a half-moon front sight.