A coin was a form of money.

One of the traditional ways to consult the I Ching was to toss coins. (TV: Warriors' Gate)

Around the late 20th century or early 21st century, Britain introduced a five pound coin. (TV: Battlefield)

Since two co-existing kings ruled on Aldebaran III, coins issued there had two heads. (TV: The Pirate Planet) The Trions used coins with two heads. (PROSE: The Eight Doctors) Altairian dollar coins also had two heads. (AUDIO: Storm Warning)

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