Thanks, Maarten - that's very interesting and seems to fit the historical trail that Toshiba wanted 'in' on 30AX either by the front door or the back door.
On the question of magnets, there is this strange Telefunken 30AX with magnets (of a sort!), from new. See:
http://obsoletetellyemuseum.blogspot...mory_4352.html
Perhaps the 30AX alignment as supplied wasn't good enough for them?
BTW, the 'Obsolete Tellye' website is a mine of background information and TV set history.
Best regards.
Paul M