I am 99% sure this is s combonation of inking and the the cancel rub making that area seem so much brighter. If you could remove all the dark from above you would likely see very light area throughout the hair. Like I said with the perf problems and overall condition its not valuable other than for your own study . Below is 2 of my large queens that I also thought (still not sure) the one on the right was an error . As you can see the hairlines are extremely light.
What you can do is soak it in peroxide which will clean it up a bit and you can at the same time get the back paper off. Peroxide needs yo be used away from bright light or it doesn't work properly. Hope that helps a bit. I literally have 100's of small queens and keep checking for anomolies or paper/ perf issues . I am 99% sure I just found my first true re-entry on a 6 cent small queen so keep looking and asking questions. Its a treasure hunt and hunting is the best part.
