Hi,
I noticed that the engraver of some Turkish Banknotes a Jan Piwczyk is missing on the list.
He was employed at the Turkish Central Bank's Printing House during its establishment in the late 1950ies.
His career seems to start in Poland as a stamp engraver, then after the WWII, he worked for Giesecke & Devrient printing house based in Munich.
ref:
https://sellosyartistas.blogspot.com/2018/12/sellos-de-alemania-1933-45.html