https://www.techradar.com/news/bowers-and-wilkins-prestige-edition-speakers-have-an-even-prettier-finish

Bowers & Wilkins’s 800 Series Diamond speakers are already some of the best in the world. The Prestige Edition models add a more luxurious finish to their already world-class performance. 

Two of the most popular 800 Series Diamond speakers get the Prestige Edition treatment, the 805 bookshelf pair and 802 floorstanders.