I put ‘Eisleben’ into the Numista catalogue search and got 5 pages of coins, including:

Maybe you can find a coin that is currently listed and looks a bit like your coin. You can use the ‘Duplicate this coin’ option in blue at the bottom of the page to create a new page if you then change the details of the duplicate page to match your coin instead. Once you submit the page, a Referee can then check the details and approve, or challenge, what you've added. Believe me, it gives you the most enormous satisfaction when you add a brand new page to this fantastic catalogue.
Good luck