I've got 2 625 Mountain Guns. The only "N" Frames I've ever owned.
Top is a M625-9 in 45 Colt that I bought as a backup gun to carry for a hog hunt in TX.
Bottom is a M625-6 in 45ACP that I bought from a former Vietnam Veteran Marine friend who has now passed. I didn't know him long but we talked via text several days a week for several years after he moved back to OK. We were kind of kindred souls and I miss my friend greatly. I will never sell his revolver.