Does anyone have info based on experience rather than assumption about this? I keep seeing postings stating that the way to tell a repro from the real McCoy is they have metric thread screws. Maybe some do but for sure, not all. I bought a set of Uberti SAA screws ($15 Dixie or Numrich) and they fit Colts perfectly except the hammer screw which is smaller diameter. My project piece below has standard American thread screws & it I think early production, is totally un marked.