Help with identification on field cap

[jayhawkhenry]

Hello everyone, 

 

I am new to IPA collecting and I was hoping you could help with the authenticity of this cap.  The information in Agustin Saiz's book is helpful but no replacement for experience.    

These are the only photos I have.

Thanks for the assistance.

Henry

47 minutes ago, jayhawkhenry said:

IPA

Obviously it should be IJA,  auto correct strikes again.  or maybe I should have a beer. 

[St.Lukas]

Your army field cap is missing it’s liner, chinstrap and side buttons