I'll try to make a picture myself to point out the differences , but untill then , here's one from the archives ( a discussion at Wehrmacht Awards Forum , picture by Viva Giulio ) .
Green being Original , Red Repro .
It does show very well the difference in WEAVE to begin with , originals of this type having a more ribbed structure ) The shape of the left eye is significant as well .
See line No. 1 : on a repro the white inside line touches the upper rim , also the repro has a perfect oval shaped left eye , instead of a small pointed bit at the bottom .
No. 5 : question mark shaped end to line on repro , sharp square hook on original .
No.6 : 2 small points sticking out into the white of jaw of repro .
This is indeed the hardest type cloth skull to identify , but I believe all of these ( small ! ) differences to be consistent , i.e. all the originals show features the repro's do not .
So for now :

Screenshot - 22-7-2012 , 3_28_29.jpg (90.84 KB, 89 downloads)