Lupin III Part 1 "The Viper" lost US dub (1972)

Interesting, and we thought that this anime was never dubbed into English.  I knew I had this feeling that Lupin III Part 1 was dubbed in English, but nobody knew about it.

I know, right? Then, we might end up finding more info on this dub, where the dubbing company that has done it would be revealed and some other info, just like what happened to the "Albert and Sydney" dub of Doraemon. And then, Lupin III fans would find out about the existence of this dub and then there would be a big hunt for it. I know this is just a prediction I thought of, but I might be wrong.

Let's think for a moment
Lupin the 3rd (Green Jacket era) aired in 1971
Anime in the US back then was neither mainstream or in vogue at that time
The only faithful dub was Star Blazers (well, the 1st season at least)
Most anime during the '70s-early 1980s was met with americanization up the arse (Battle of the Planets being one such example)
It would be impossible for the 1971 Lupin to be brought to the US for many reasons
1. at the time (until the mid 2000s) TMS was in a legal struggle with the Maurice LeBlanc estate whom at the time (until now) had rights to Arsene Lupin hence the constant renaming of Lupin outside of Japan (noted examples: Cliff [Cliff Hanger (the arcade game)], The Wolf [Streamline Pictures's dubs of Lupin]) plus a planned Lupin the 8th anime intended for western (US, UK/EU) audiences was scrapped due to legal complications with the LeBlanc estate which lead TMS and DiC to retool it into "Inspector Gadget" [yes, really!]
2. Lupin 1971 was not kid friendly (well the 2nd half is but that aside the point)
3. Anime in the US was mostly allocated to syndication (which makes it hard for people to find it depending on where you live)
4. Distributors are nit picky in terms of what to localize during this rocky time for Anime in the USA (take "Rocky Joe" for example, It's distributor shit canned the dub due to quickly realizing how dark the show gets later on)
5. TMS never got lucky with the US until the mid/late 1980s by way of outsourcing (DuckTales, TaleSpin, Batman TAS, etc) - their anime however was hardly or never brought over to the US (example of TMS anime that was denied US distribution: The Adventures of Gamba) until the mid-late 1990s [hell, Lupin wasn't brought to the US until the early 2000s courtesy of the now defunct Pioneer/Geneon]

I wonder where this user has heard of this dub.

Syndicated anime is also prone to censorship
Noted examples being Season 2 of Star Blazers (copping out the finale), DiC's run of "Sailor Moon", Saban's run of "Dragon Ball Z" and again.. BATTLE OF THE PLANETS
I'm sure they revised any mention of this hypothetical dub as they can't find any proof to back up the existence of it
We know Rocky Joe existed and why it's dub was scrapped, We know Gamba almost got a dub but US broadcasters didn't give him a chance
Also again, Anime in the '70s - early '80s [and especially the early 1990s] in US broadcast is normally seen in the same light as typical SatAm fare thus they were prone to the same guidelines as US fare until the rise of cable television and venues like Sci-Fi (now Syfy) Television and CN's "Toonami" became a thing

Again, There's no evidence apart from hearsay that the dub even exists
As i stated, It's not possible or logical that the 1971 Lupin anime would get a dub given the climate anime was in during that time
Again, the only anime that got away with some mature subject manner but met with minor alteration was Star Blazers (even though the 3rd season was re-tuned into a comedy with all of it's content left uncut - as noted by Corn Pone Flicks's retrospective on the dub)
Those beyond that are met with heavy alteration (especially those aimed for syndication) like Captain Harlock (which went through 2 or 3 failed english dubs), Candy Candy and many others
Plus as i also mentioned, Aside from the tone shift in the 2nd half of the 1971 series - 1971 Lupin won't work in the US given the mindset towards anime and cartoons at that time .. and even if they tried, It'll likely dub the Takahata-Miyazaki episodes of the 1971 series and not the 1st half because "think of the children"

As i also stated, Anime during the 70s, 80s and early 90s [at that time] have syndication and/or home video as their only outlets and distributors of those platforms are very picky of whom to dub for US audiences (namely what would be toyetic or bring in big ratings - something along those lines) hence why gems like TMS's Adventures of Gamba never saw a US dub and why Gundam and Lupin never saw a US debut until the dawn of the New Millennium (1997-2000s)