I met Vail Ennis when I was growing up. I remember he usually carried a Smith & Wesson 44 Special. If those grips are for an N frame, they would fit a 357 or a 44. They are a real collector item and I would not do anything to them other than put them in a case as you have mentioned. I also remember that he drove a Hudson Hornet and then I think an Oldsmobile after they made the last Hudsons in 1957.