Ultra high-grade factory sealed Retromutagen Ooze released in 1989. One of the more popular TMNT items ever released and still very much a fan favorite of TMNT collectors. Our example is pristine. The clear plastic seal overlay is perfectly intact. You’ll be hard pressed to find a superior example. It is the first time we have offered the original Retromutagen Ooze in our auctions. Encapsulated by CAS (85+), #10217290