The New Service manufacturing equipment, like that for the Single-Action Army, was left outdoors at Colt during WWII, and was no longer useable. It was deemed unprofitible to make the gun again. Its popularity had fallen off, along with some other Colts, and unlike the SAA, the NS had no Western TV shows and movies to plead its case. It is also a very large gun for most peoples' hands. And, like all older Colt D.A.'s, it's cylinder timing leaves much to be desired. The Anaconda apparently filled its role at Colt's. Neither is as handy as an S&W N-frame, and I personally doubt that Colt will again make the gun, despite rumors. If they do, as a nostalgia item, the price will probably be ghastly, as is usually the case with Colts
JW