Wiley Clap - Novak rear sight w fiber optic front. I love fiber optic Front sights but not for the rear sight. I've been watching GunsAmerica and Wiley's sell for $7-800 and they don't sit long.
Normally, I prefer ADJ sights on my revolver but once you have the Wiley sighted in so POA is POI for your chosen load - I imagine you'd have faster target acquisition. Love to try my theory.
A gunsmith came up w a method to create a similar set up in any J Frame and he will zero it for your load of choice. Approx cost $300. I have a lot of trouble seeing the sights on J Frame fixed sights.
PS: They did make a TGT model J frame w adj sights but those are hard to find and mostly regarded as SW Trivia.