Thank you Gailen.
Someone was kind enought to send me, via e.mail, a copy of Stephen's book on "Reproduction". We can clearly see that on page 43, there's a reproduction blade being illustrated by E.Pack and it is the same identical blade as the one being shown here.
It has the same flaws, the horizontal line that connects the "T" in the word Ernst with the line that meets the "R" in the word Rohm.
This is only one example among many.
If someone could post the page 43 from Stephen's book, it would really be nice.
Thanks !