letranit and skg screwdrivers

[Rafvdb]

Hello, my name is Raf, and i live in Belgium.
I am a egineer by education and a bit crazy on vintage screwdrivers.
especially european made, with transclucent handles.
I came across a brand i did not know.
It is marked letranit ,
Made in germany ( not west germany)
So faily old.
does anyone has some information?

 

[Rafvdb]

I also have a lot of older SKG screwdrivers.
Does anyone has some ectra info on these midels?
Age?
Steel quality? Difference between chrome- vanadium and the SUPER range?
Handle material…