Those sights look like they would work just as well on the Mark IV Target, etc.
The rear sight is an evolutionary improvement, but nothing earth-shattering. I notice that it has two set screws (on either side of the elevation adjustment screw), instead of the one that's on my Mark IV Target. However, the screws themselves are missing in your example, and all you have are the threaded holes. The screws serve to take up any looseness in the dovetail.
Regarding the front sights, I notice that the rear surfaces on yours -- serrated or not -- are sloped slightly towards the front. On my Mark IV Target, that rear surface is exactly vertical, and the front surface is angled rather than rounded. Still, that's better than the original front sights on the early Marks, which were severely undercut, sharp, and therefore known as "holster-rippers." (I've replaced my front sight with a serrated ramp from the Ruger Single Six, which fits with a minor adaptation.)