What is cordit? Ny brother is writing the historie of Norwegians post uniform. From 1935 the CAP visir EAs supplied in cordit (replaced treated leather). We suppose this to be a tradename for a more precise chemical composition name.
We have come a bit further. The spelling is corrected to Cornit (e?).
This is probably a tradename for an early plastic material, possibly celluloid or similar. The material is used for the front shade/visor of the cap. It is not any form of textile, or fiber cover. The name could stem from Europe, possibly UK or Germany, or US, or anywhere else.