A Thousand and One Nights (found English dub of anime film; 1969)
A Thousand and One Nights is a 1969 anime feature film directed by Eiichi Yamamoto, collaborating with Osamu Tezuka, and the first entry in Mushi Production's Animerama trilogy, a series of anime films aimed at adult audiences.
The film was also given an American release at some point in 1969, complete with an English dub, predating the first American X-rated animated film, Ralph Bakshi's Fritz the Cat, by three years. However, while the film was a hit in Japan, it did poorly in the United States, where it only received a limited release. Additionally, the English version had 28 minutes of footage cut from the film for unknown reasons.
Reception and release
A Thousand and One Nights was a critical success in Japan, performing well with a distribution box-office revenue of ¥290 million. Outside of Japan however, the film was mostly ignored due to an absence of demographic (this was when animation was all thought to be for children), with the American dub's release being so limited (allegedly only given a release in grindhouses, but that is yet to be confirmed) with reviews being generally negative at the time of release that it had quickly faded to the sands of time, according to Cartoon Research.
For many years, the fate of the dub was unknown. The trailer of the dub was at one point scanned and uploaded to the internet, but the source is yet to be found.
On May 3rd, 2020, anime distributor Discotek Media announced that they have discovered the English dub from an old print of the film. They have restored the dub and will be releasing it on Blu-ray alongside the original Japanese version. 
- Wikipedia page on A Thousand and One Nights. Retrieved 03 Dec '17
- IMDb page on A Thousand and One Nights. Retrieved 03 Dec '17