The Sun Moon can still be found in the Book of Timepieces 2004/2005. The LE Platinum Sun Moon was introduced 2003. And I recall once seeing a Sun Moon with the fish engraved on the back, which was not introduced for the Reverso range before 2004 (but I am not sure about that). Thus I conclude it was produced from 1999 to 2003/4.
Given the fact that it was available in white or red gold and platinum only, it should be interesting to know the production figures.
Christian