Switzerland Zurich 6

Could you help me about the stamp from the attached picture?
It looks like the 6 of Zurich 1843 but on genuine ones I saw, there are no numbers in the corners.

Is it a fake or something else ?
Like original, it has red vertical lines as background.

Thank you

Fake

It is the first forgery type listed by EAREE in the book ALBUM WEEDS . There are 20 different forgeries of this stamp . There are no dots over the you of Zurich ,and no hyphen between the words LOCAL-TAXE.

No dot over the you of Zurich . not YOU.....LOL.

U -mister spell checker --you

I give up ,try to fix it four times already -"U"

Thanks for your reply floortrader.

Some aditional questions:
Can you give me the reference of the book ALBUM WEEDS ?

You are talking about the dots above the U. This can be a mistake by the author of the fake.
But what about the 1,8,4,3, which are in the corners ?
Why has he add these ones? They are so evident !

Sorry Priatel ,stock market is falling fast and playing for a downward move right now . Back to your question ----EAREE doesn't explain the reason ,but the first two fakes have the four numbers in each corner ,the third forgery has 18 and 43 in the two lower corners . Each forger had his reasons to change something ,many forgers were stamp dealers so maybe they did not want to get stung with their own fakes .

OK thanks
And were can I find ( or download) the book(s) concerning the fakes of the firsts Swiss stamps?
Do you have some references about that?

The book is available online here:

https://archive.org/details/albumweedsorhowt00eare

Thank you for the address !
I have started to read the book.
It's impressive !