I recently picked up these pieces.
I'm of the understanding that Davros is a second gen ( copy at and by the bbc) from the Colin Baker/Peter Davison period
The Sontaran is from the original mould. circa 1986(approx) from "The 2 Doctors"
The Daemon is from the original mould 1971 but was used for copies - Jon pertwee.
Feel free to correct me if i'm wrong but the source these came from is very reliable