The Isle of Man is a self-governing British Crown dependency in the Irish Sea between Great Britain and Ireland. The first cards, one 10 units with a 14,500 run and one 20 units with a 13,600 run, were issued in 1987 and were optical cards produced by Landis & Gyr. These were also the only Landis & Gyr issued by Manx Telecom, as the following year they began to use the magnetic system by GPT.