Operated from 1996 to 1999, possibly earlier, issuing stamps.
Updated 18th July 2003
Operated in 1987 and then from 1989 to 2003, issuing stamps.
Updated 7th January 2009
Operated from 1995 (possibly earlier) to 2003, issuing stamps.
Updated 26th November 2005
Operated in 2005 only, issuing stamps.
Updated 7th December 2005
Operated from 1990 onwards, issuing stamps.
Updated 6th October 2003
Operated from 1982 onwards, using a cancellation only.
Updated 15th February 2008
Operated over an unknown period, using a cachet.
Updated 18th November 2004
Operated from 1986 to 1990, possibly later, using cancellations only.
Updated 20th November 2003
Operated in 1983, possibly later, issuing stamps.
Updated 29th November 2003
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