Hi.
Our polish friend, open_razor, sells NOS Friodur razors stated as being 8/8 but in fact are 7/8.
Now there's another chap who sells this same razor, but with a different handle. It says "Blue Diamond", I don't know if these are the original stock scales. At 79 Euros, it might be worth a look here.
Did someone find an old store with loads of NOS 50-year old Friodur's?