I check-out Ed's Gun Shop website daily. Full disclosure, I have bought firearms from him over the years, but he wouldn't know me if I walked through the front door.
While checking out his new/used update, I saw the above captioned firearm. The link is to the photo. The unique feature is it is a decocker with no slide safety and a bobbed hammer. My assumption is that it is a DA/SA with the decocker to make the pistol safe.....like the Sig P series. Never have seen one before. Perhaps it was a departmental special order. Enjoy!
https://edsgunshop.com/product/used-sw-5924-9mm-pistol/