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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://viewcomiconline.com/weird-war-tales-1971-issue-15/
https://viewcomiconline.com/house-of-mystery-1951-issue-215/
https://viewcomiconline.com/batman-v1-250/
https://viewcomiconline.com/g-i-combat-1952-issue-167/

Here also are the Haunted Mansion model kits, in another 1974 2-page centerfold ad..
https://viewcomiconline.com/weird-war-tales-1971-issue-25/
https://viewcomiconline.com/g-i-combat-1952-issue-171/

And similar "Vampire" and Mummy "Time Machine" kits in another centerfold ad.
https://viewcomiconline.com/weird-war-tales-1971-issue-33/
https://viewcomiconline.com/g-i-combat-1952-issue-175/