Originally Posted by unworthy1

My eyesight and monitor both leave something to be desired, but looks like it's cursive/script (which can deceive) and to me
R u s r
or
K u s r

and with the mentioned "curvy underscore" and star underneath the cap letter (R or K)

I'm tempted to say it might be Cyrillic, but don't know much about what cursive letterforms look like in that alphabet, also the final "r" could be in capital form (R), even though same height as the lowercase U and S and might therefore be from "another alphabet"