It isn't a coin. Nuremberg (spelled "Nurnberg" in German) was a major centre for the manufacture of tokens, jetons and play money; this is presumably such a piece. "Landesaustellung" translates to "National Exhibition", so it was presumably made at the Exhibition and sold or given away as an advertising-souvenir. Such pieces certainly exist for large international exhibitions held here in Australia in the 19th century.
Here is a set of three of these miniature medals for sale, including your type with the Weinhaus, for 20 euros.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis