Help ID Penny Red With Strange Watermark

Hello yesterday I bought a large collection of Penny Red stamps.I don't know much about the early GB stamps. This looks interesting.It has something under the crown(wmk).can by valuable?
I'm also interested plates number. Thanks !

Hi kirku, and welcome to the forum. I do not see anything where you put your circle except where the ( written ) cancellation bleeds through!

Peter

Thank you I added a new picture

Maybe if you could also post a picture where you use a different color to trace over what you think you see that is "different". At this point, I agree with Peter. The only thing I see in addition to the crown watermark is the shadow caused by the pen cancel.

I placed new picture and I'm afraid that I can not do anything else on the scanner. yellow- cancellation, red-???.

OK Kirku, the last edit you did makes it clearer what you are seeing! It looks like a cleaner area in the paper, but not really anything special. I would love for Galeoptix to chime in; he is great with paper varieties.
Kirku, if you can make the heading of this a bit clearer - instead of wmk write out watermark. Maybe Galeoptix, a collector from the Netherlands and a specialist on paper making will notice that!

Peter

hello again. I checked this stamp in special fluid. This red line is a part of the watermark. I have not seen a similar crown. Its error crown?

I will try to add a new picture

Petert4522 has it spot on when he describes it as a cancellation bleed through. Do a horizontal flip in your image viewer of the front of stamp and you can see it coincides exactly with the manuscript pen marks bleeding thru to the watermark side.

edited to say it is a horizontal flip required... I was lying down at the time of posting

thank you but when I put in the fluid I see watermark. I dont see cancelation. I know it is in this same place ????