HELPING THE OTHERS REALIZE THE ADVANTAGES OF DAN WESSON SLIDE SERRATION

I noticed inside of a collector's book another day a listing that said the model 12 was created only in 1970 and 1971--a discrepancy needless to say. I am imagining we nevertheless don't have fully precise and dependable facts on Dan Wesson output.So the cylinder is undoubtedly different.  Perhaps the threading differs from model to model to keep