Help with identification of British(?) stamp

[Theemed]

A wonderful day to you all.

I'm a new user of Colnect - so I do apologise if this was posted in the wrong place - and I was curious if people here would be willing and able to help me identify a weathered stamp.

I was organising an old collection of my father, and came across this stamp. He had put it in his section for the U.K., so I am assuming it's from said country.

That having been said, most of the stamp is entirely missing, so I was curious if people here might have a better idea.

I think that it has the 'Crown Type 10 [Up]'-watermark, though I am not 100% sure, as I am far from an expert.

Any and all help will be appreciated.

IMG_20250914_165014.jpg (1.43 MiB) 查看 128 次

IMG_20250914_165024.jpg (1.48 MiB) 查看 128 次

IMG_20250914_165257.jpg (161.43 KiB) 查看 128 次

[Jeroen-Janssen]

Could it be this Queen Victoria, 1887 stamp: https://colnect.com/nl/stamps/stamp/106 ... Koninkrijk?

Or King Edward (1911): https://colnect.com/nl/stamps/stamp/973 ... Koninkrijk

But with the green completely missing. These stamps are known to be light and water sensitive. So the ink easily bleaches out. In your stamp the green completely degraded due to whatever bad conditions the stamp might have experienced in over 135 years...

[Theemed]

Both options make a lot of sense, thank you.

Would you reckon that there is anything else I could do, in order to find which of the two it might be?

(Given your attachment about how easily the stamp's ink can be damaged, I have my doubts, but you likely know a lot more about this than I do.). ^^"

Thanks in advance.

[Tyroxin]

Given they are printed in typography, you might be lucky if you can make out traces of the impression (provided it was not flattened as well by 135 years in a stamp book) by holding it against a light in a flat angle.

Or you create a high resolution digital scan of the front side and try to recover miniscule differences in color and contrast in an image viewer. The quality of your photo is improvable for that, but I would lean towards King Edward based on it.

[Revenue-Catalogue]

Apart from the portrait itself, the key difference is the position of the "POSTAGE & REVENUE" wording at the top, as the Edward VII issue has a crown in the middle while the Victoria one does not.

After playing around with your image on an editing software I think it's the King Edward VII stamp, since I think I could make out some traces of the crown.