ZFR 3 References

[LukeFF]

Hello,

I am looking for information about the ZFR 3 B telescopic sight installed in the Hs 129 B-3. What I am in most need of is:

-Detailed pictures, drawings, etc. I have found a couple via a Google search, but unfortunately they aren't that big. I already have the references from the books by Martin Pegg, MBI, and Squadron/Signal.

-Information about what the crosshair(s) looked like. From the pictures I have seen there were two different sights - a standard reticle projected on a glass plate on top and then the telescopic sight below it.

-Magnification power of the telescopic sight.

Thanks!