Woohoo!! :shock:
Looks like an ultra-deluxe Angel Heart artbook/portfolio, probably a limited edition.
I guess it's from an auction website?
[Edit] Ok, I found the corresponding auction
here. It's actually a box containing 18 separate illustrations edited to celebrate the 10 millionth copy of the manga.
From what I've understood, the boxes were awarded through a lottery... happy are the lucky ones!