How much is a 1955 Austria 5 Groschen worth in American money?

There were 12.288 million of these zinc coins minted that year and it may currently be worth about .10 with heavy wear to maybe .50 with light wear depending on amount of collector demand. The bad thing about zinc is that it develops white rust spots from contact with moisture in the air that will inevitably consume the coin and destroy any value it may have. Collectors will avoid most zinc coins that show any signs of white rust. You might also try a library for a copy of the Standard Catalog of World Coins for pictures, values and lots more interesting info. brad