24 Mariengroschen Error?

Hello here is my coin that I have recently purcased
 https://en.numista.com/catalogue/pieces42078.html
I am sure that my coin is the correct KM# that I have added but my coin seems to have quite a few differences or errors?

The middle part that it has H H in the middle instead of thre *** is normal this is also in the catalog but I have marked some other inconsistencies; for example some missing letters and on other places too many letters or even numbers. Is this a rarity or common on coins of the German States of that time? I am sure that this is not a fake or a copy as I have purchased it certified as an original by one of the largest and most trusted numismatic coin dealers in Germany - Numismatic Lanz.
Any expert advice on this would be greatly appreciated.

I think I would be asking the shop/website that you bought it from.

Hmmm... there seems to be variants on this coin  under the Km#685. Different mints and mintmasters.
The closest I've got to yours is below. Note the slight differences :The dots flanking the "HxH" are missing. The number and positions of the conical ground cover underfoot are different to yours. Rope ends too.

Bottom link: 2's are like the letter Z

As Tony_K  has suggested go to the seller an ask for any additional information if there is any.

http://www.welfen-muenzen.de/anthon_ulrich.html

24 Mariengroschen, fine silver
AV: Value in 5 lines
Romanization: D.G.ANTONI9 ULRIC9 DUX BR & LUN.
RV: Wild man with fir in the left hand, left the value numeral 24; headline Constanter
Welter 2309 - Davenport 345

Here's another: http://www.ma-shops.us/siee/item.php5?id=111223008&lang=en

Good luck!