Here is a mystery.
I've been working again on some new manuscripts and this small fragment still has me stumped.
It came from a collection of small pieces which turn out to be mostly biblical (1 OT; 5 NT so far identified); but other than some ideas about the letters and a possible colour match with one of the NT pieces, I can't find a fit.
So feel free to solve the mystery. I shall give you full credit. You may "discover" a new piece of the Bible.