That would the the La Chasse DU Engraved Collectors Edition. It was manufactured from 1998-2000 and it was produced in 9mm and 40SW. They also made an edition called La Chasse Engraved (minus the "DU") which was actually engraved and not laser etched. That engraved edition fetches around $2,000 new!
The P99 can be purchased in three classes of engraving.