UBB.threads Forums Uniform & Accessories German Military Uniform Forum Need help with HJ overseas cap please

Hello friends! I was hoping I could get some info and opinions on this HJ cap. The construction seems good to me, no glow under blacklight, looks to be cotton with rayon type lining. No tags or marks. What is throwing me off is the yellow piping. I have seen the standard red, and a white piped one from a certain school, but can find no reference to yellow. It looks the same as the rest of the material in the pics, but in person it is discernably different. Any help would be appreciated.