The N-frame holsters are hard to come by. I'm just guessing,but it could well be that most revolvers of the period,other than the SAA, were made on a smaller frame,thus the preponderance of holsters for those guns. This is one of only a couple of holsters that I own which is actually marked for an N-frame. In this case,for a .38/.44 OD with a 6 1/2" bbl.
f.t.