Sorry, I mis-read your initial mentioning of the engraving. It's actually a rollmark. These won't be in the blue book listings. They're what's known as distributor editions. Many distributors do this now. Different chamberings, finish, grips, etc than cataloged models. They often do command a premium depending on what they are and the number produced. I try and keep an eye on these stainless Bisleys and don't see them going down in value at all. The .44 mag and .41 mag ones that originally sold for $450 or so now will fetch upwards of $600. The more curent ones, of which your is one of them, will generally be in the $500 range as they're still fairly easy to locate new. Usually there's 1000 or so produced at a minimum but some have more, others far less. I believe these had around 1200 or so made up but with this latest batch I'm not sure of the total on this model. Regardless, shoot it and enjoy it.