I have a 4" Standard Model from the early 50s. Cosmetically first class aside from a small rust pimple and one shaggy original magazine which may not be original. Sights were unbelievably far off, over 8" low and right. My theory was that it remained in near-new condition because no earlier owner(s) could hit anything with it and so, seldom fired it. It took me quite a while to achieve POA = POI. Rear sight was exceedingly difficult to move,like welded ino place, and I nearly gave up on it. Also I had to file the front sight blade down to get the correct elevation. I bought two Mec-Gar magazines for it, they work fine.