This Versailles Philharmonic Quintet's autographed card surfaced just after the 2011.2.13 event celebrating HIZAKI and YUKI's birthday.

I believe it was offered to people who attended the event for Fan Club members-only at Shibuya Trump Room, as it is presented as a "Thank you" card.
I got mine on Japanese auctions.

The back of the card bears Versailles' logo.

Versailles Philharmonic Quintet: Autographed Card for 2011.2.13 SAINT'S V-DAY