The first appearances of several X-Men and Spider-Man are among the featured lots in Heritage’s Sunday & Monday Comics, Animation, & Art Weekly Online Auction.

Giant-Size X-Men #1 CGC 9.6 introduces Storm, Nightcrawler, Colossus, and Thunderbird, along with the second full appearance of Wolverine in the first X-Men story in five years. Written by Len Wein with art by Dave Cockrum and a cover by Gil Kane and Cockrum, the issue is ranked at No. 9 on Overstreet’s list of Top 10 Bronze Age Comics.

The friendly neighborhood Spider-Man is introduced in Amazing Fantasy #15 CGC 4.5. Along with his debut and origin, this issue introduces Uncle Ben and Aunt May. Boasting cover and art by Jack Kirby and Steve Ditko, this issue is on the top spot on Overstreet’s list of the Top 50 Silver Age Comics.

There are 770 lots of comics, original art, and memorabilia in this weekly auction. Bidding opens at 6 PM CT on HA.com.