I do have this cap in my collection. But with the reference books I got i just cant figure out of i can say this an authentic one of not. I'am leaning towards authentic, it got that "smell" aswell.. Altough i'm not sure about the material, slightly offset/misformed eagle(seen authentic examples like that, also in books). It also seems like the cap itself is made from vulkanfiber? And it got some slight damage on the green piping.
According to the inside the cap is made in Klagenfurt Austria by a maker named Karl Petrasch. I did found out that they still exist. So this means the cap is made after march 1938 is my best gues..lol...If its authentic.
What do you think? If we need additional photo's please say so