Guineas from the reign of George II
Old foreign coins vary considerably in condition. Coins with sharp images and clear legends are always more valuable than coins that are worn or misshapen. Identify your old foreign coins by looking for mint marks and other signs of the place of origin. Very old coins can often be identified only by the name and portrait of a ruler. Other emblems, too, may give clues as to the coin's identity. Early English silver pence were stamped with a small star or "sterling," giving rise to the modern term "pound sterling." Old Portuguese crusados bore the mark of a cross on the reverse.
Identify your coin by comparing it with descriptions of known specimens.
"The Standard Catalog of World Coins" provides detailed descriptions of old foreign issues in four volumes spanning the period from 1601 to the present. Online sites, such as My Coin Collecting and Coins International, list recent sale prices as well as coins currently offered for sale. My Coin Collecting even features an interactive coin catalog that allows potential sellers to enter country of origin, ruler or period and denomination.