Looks like an old weapon with new grips to me. But "old" is a bit perjorative. Yours looks to rather be "well-seasoned" (amazing the constructs a guy in his mid 50s can come up with). Is she dependable? Accurate? And do the new grips afford you a better hold on her?
I am reminded of a story about Wyatt Earp buying a pair of revolvers, and choosing a pair of used ones over new ones because he wanted proven dependability and no stiffness in the action. I understand wanting to improve appearances, but to me a well-seasoned firearm (not rusted or corroded, just well-seasoned) tells me that here is a man who practices with his weapon and knows it. There is cachet and then there is cachet', ne cest pas?