Before 1958, it was just known as the Combat Masterpiece. In the days of bulletin boards and, later, the Internet, folks sometimes used incorrect terminology in order to convey information on what they were trying to identify or highlight. Supica and Nahas did terrific jobs on 4 editions of the Standard Catalog but somehow they corrected the header for the K-38 Masterpiece to remove "target" but didn't correct the body. So, it persists even after many, many eyes were on that book during its last editing over on the Blue Forum. Personally, I don't have a dog in this fight. But, you'll get multiple corrections over there by the Accuracy Nazi's if you misuse a name or number. I can see being precise if you are buying a S&W because they actually made some 4" Masterpieces which can get confused with Combat Masterpieces. So, you have to know they had Patridge front sights, not ramps.