Hello Ryan, up to now I have not seen any specked RK leader�s portepee which did look original. I do have several "wearing2 pics and there is nowhere a flecked cord to be seen on DR leaders portepees. This said I have to add, that the rare postal protection leader portepee is sometimes erroneously taken as RK portepee. And yes, on my PPdagger wearing pics you can clearly see the flecked cord.
A photograph of your portepee in question would perhaps help.
Yes, fakes do (mostly) glow under UV but sometimes you have to examine very carefull, press slightly(!) apart the strands on the acorn or even the cord to check the material beneath the outer strands.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.