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Pirates of the Caribbean model kits, in July 1973 DC ads, across both regular comics and the 100 page issues.

[Linked Image from image.invaluable.com]

[Linked Image from undermountain.org]

Very cool on their own, but even better once you'd seen the then-new Pirates attraction at Walt Disney World, as I got to do a few months later.
Much as I loved the ride and this ad, I never got the kits, or saw anyone else who bought them.

Here are some issues with the ad :
https://readcomiconline.li/Comic/Weird-War-Tales-1971/Issue-15?id=35465
https://readcomiconline.li/Comic/House-of-Mystery-1951/Issue-215?id=70749
https://readcomiconline.li/Comic/Batman-1940/Issue-250?id=17864
https://readcomiconline.li/Comic/G-I-Combat-1952/Issue-167?id=34998

Here also are the Haunted Mansion model kits, in another 1974 2-page centerfold ad :
https://readcomiconline.li/Comic/Weird-War-Tales-1971/Issue-25?id=35502
https://readcomiconline.li/Comic/G-I-Combat-1952/Issue-171?id=35012

And similar "Vampire" and Mummy "Time Machine" kits, both shown in another centerfold ad :
https://readcomiconline.li/Comic/Weird-War-Tales-1971/Issue-33?id=35523
https://readcomiconline.li/Comic/G-I-Combat-1952/Issue-175?id=35022