Jagdpanther's sights?

A question I arrived at when I was working on custom sights.
The sights of the Jagdpanther in the game are set to Sfl.Z.F.1a, but there are many theories on the net and I am confused. after all, I don’t know which one is correct, so I would like to know if anyone has a source.

Early: Sfl.Z.F.1a
Late: Sfl.Z.F.5 or WZF1/4
Is that correct?