This is just a suggestion if anyone is looking for open sight options for the S&W 52. It's intended for shooters, not collectors.
You can use a Bomar rear sight or a full length Bomar rib. There is also the Bomar rib with extended front sight that adds about an 1" to your sight radius. The rib also adds a few ounces that can help your follow-through. This is a huge benefit that offsets the punishing nature of the M52 trigger release.
Many Bullseye shooters swear by the the solid and repeatable "clicks" on their Bomar sights. The rear sight blade offers a full unobstructed view that is generally an improvement over the typical factory target sights offered by S&W, High Standard, Colt, etc.
Attached picture is from an online sale I saw. You may notice that even without the extended front sight, the rearward extension adds about a half an inch of sight radius.
I think it is a pretty cool look.