The other 4 stamps look good.
Pos.20 rounded right leg if upper R,Forked right leg of lower R.
Pos.28 Breaks in the Lower P & rounded bottom.Black dot in the leg of A.
Pos.10 Upper left arm of Y,black dot on top.Right leg of lower R shorter.
Pos.3 Upper right arm of Y short.Tip of rope work right of 10 broken.
There could well be printing variations in all this.Would need lot's of
comparing with certified examples. Below: Certified stamps.Pos.15 & 16.


For Pos.25 ;will have too find a certified copy and compare again;(case not closed).

Added comparison; Pos.20 pic 1)rgstamp,pic 2)certified stamp.

https://auktion.hba.de/de/i_9201_14...92&row_nr=23