I am a beginner collector of normal German stamps and especially with flaws.
I don't know English well and I guess that the definition for "constant flaw" is "plate error in identified field" in the sheet.
What I think about the 10 Kr stamp (with defective E) is that it is not flaw.
I already have 2 stamps of this type and on the net I found 4 more, all of the same type. My conclusion is that all the fields in the sheet show this deformation of E (error in all fields = normal stamp = not flaw)
What I'm looking for, is a 10 Kr stamp with a normal E and I hope that the collectors who own it, will post it or confirm to me that their copy has a defective E.
Please post, if you can, your stamp without E defect.