Thats one of the biggest problems, when you try to make some research in history. >>> RUMOURS!
The rumours from some hearsay will spread faster, than the facts...
In Germany the ST1 was also called "KÖHLER" Robot. In former times, 20 or 30 years ago, everybody knows the ST1 under that name. I visited the old Köhler Company and speak to workers and Köhler collectors. Simply no evidence for that! Nobody can tell you, why it was called KÖHLER Roboter... Only many presumptions without any base.
In case of the Dux Astroman, somebody posted on his site and on FB, that there was a was pre run of "Take apart" mechanical Astromen first. I guess he simply mixed it up with the Roboter 700. Its complete B.S.! And in the end I have also found e-bay auctions with spreading these "wisdoms".