Operated from 2003 onwards (possibly earlier), issuing stamps.
Updated 25th November 2008
Operated from 1990 to 1992, possibly later, issuing stamps.
Updated 18th July 2003
Operated from 1981 onwards, using a cancellation only.
Updated 26th November 2008
Operated from 1990 onwards, issuing stamps.
Updated 7th March 2007
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