The Opus 6 may have been the last real recognised Harry Winston 'Work' before the most recent Opus X resurgence.
"Opus" 7, 8 and 9 failed to spark PuristS passion, let alone fervour, not to mention plain indifference and (gasp) even uncharitable thoughts!
Nobody knows why. It just was...is.....will be......
Better to look forward from Opus X.
Regards,
MTF