Operated from 1984 to 1999, issuing stamps.
Updated 27th July 2005
Operated from 1985 to 2001, issuing stamps.
Updated 30th December 2005
Operated from 1995 onwards, issuing stamps.
Updated 9th March 2007
Operated from 1991 onwards, issuing stamps.
Updated 3rd January 2006
Operated from 1990, possibly earlier, issuing stamps.
Updated 15th September 2005
Operated from 1996, issuing stamps.
Updated 28th November 2008
Operated from 1982 to 1983, using cancellations only.
Updated 27th July 2005
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