This is an 1851 Austrian 1 Kreuzer (1 Kreuzer) copper coin graded by NGC as AU 55 BN (AU 55 stands for "near uncirculated 55 cents", the surface of the coin has slight circulation wear but the details are clear; BN is "tan", referring to the color of the copper coin's patina) Year: 1851, issued during the Austrian Empire ("AUSTRIA" in the label corresponds to the Austrian Empire at that time); Face value: 1 Kreuzer (the minor currency unit of Austria at that time, 100 Kreuzer = 1 guilder); Mint: The “A” in the label is the mint mark, representing the Vienna Mint (the main mint in Austria); Pattern: On the front is the "double-headed eagle coat of arms" of the Austrian Empire (symbolizing the rule of the Habsburg dynasty), on the back is the face value "1 KREUZER" and the year "1851". This is a copper coin made of copper-zinc alloy (brass), weighing about 2.7 grams and 18 mm in diameter. It was a small-denomination currency in circulation at that time.