I used the promotional 15% off coupon towards the purchase of this huge (28.5" x 11.5") centerspread piece by Mike Nasser featuring Werewolf by Night vs. Spider-Man. It was published in Super Spider-Man #173 (Marvel UK, 1976). The images below are the original art, published centerspread and the published cover.
Here's what Mike said about the piece: “With the landscape printing format, a double page spread has the same area as a double-page portrait format ...but because of the long double width, it feels a lot larger. While doing this, Rick Bryant visited the studio and gave some pointers as to how to create the stipple effect with a toothbrush. Good to see it's in good hands!”