Operated from 1994 to 1998, issuing stamps.
Updated 16th November 2003
Operated from 1983 onwards, issuing stamps.
Updated 10th November 2005
Operated from 1981 to 1984, possibly later, using a cancellation.
Updated 5th September 2003
Operated in 1982, using a cancellation only.
Updated 3rd September 2005
Operated from 1994 to 1995, issuing stamps.
Updated 24th August 2005
Operated from 1981 to 2002, issuing stamps.
Updated 7th March 2007
Operated from ?, using a cancellation only.
Updated 24th August 2005
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