A rare gold coin dating back more than two millennia to the year 191 BC has been found at a dig in northern Israel.The antiquities authority said the coin is beautiful and in excellent preservation. In a statement, head of the authority's coin department, Dr Donald T. Ariel, said it is the heaviest gold coin with the highest contemporary value of any coin ever found in an excavation in Israel. He said the coin weighs almost 27.71 grams, whereas most ancient gold coins weighed 4.5 grams. It was minted in Alexandria, Egypt during the reign of Ptolemy V in 191 BC and bears the name of the wife of Ptolemy II, Arsinoe Philadephus (II). The coin was uncovered at a site at Tel Kedesh near the border with Lebanon by a team of American archaeologists from the universities of Michigan and Minnesota.