My friend Richard Tietze has this original Wehrmacht instructional book on sign painting. There are some illustrations of writing stuff inside. The dip pen nibs shown are from Brause, Soennecken and Heintze & Blanckertz. The waterproof ink and paint is from Pelikan. 

Vintage Heintze & Blanckertz nibs can still be found. The Berlin factory was destroyed in WWII and after the war a new factory was built in Frankfurt am Main. The “Berlin” marked nibs are all from before 1945.