Comes with certificate of authenticity. Signed by Mignola and colorist Dave Stewart.
From CoA:
This print was created using an Epson Stylus Pro 7890 inkjet printer with Epson Ultrachrome HDR K3 archival ink on Premier Art's Smooth Hot Press Fine Art 270 gsm paper.
This art existed as a black and white ink drawing by Mike Mignola and was digitally colored by Dave Stewart.
The digital file was created on 6/3/10. It was printed on 1/25/12. No more than 10 artist proofs will be made and will not be offered for sale. It was printed by Dave Stewart, and it was signed and numbered by the artists.