Universum-Cassetten (und andere vom Versandhaus Quelle)

[EZ647]

Red doesn't have guide rollers, and those hubs are weird, I've seen similar in Polish Wiskord audio tapes, or some pre-recorded tapes from Poland. Although internet sources say that the components were supplied by Magna, or another
German manufacturer, and they only made their own tape.
The black version, looks like the old Agfa.
The grey version, looks like those cartridges from Singapore, according to hubs.
Those booklets would really come in handy, when the type of tape used is listed there.

I'm attaching pictures of the special audio cassettes, where the identical hubs are used, as in the Universum red one.
The tapes are called supertape and superferro, and I don't have a cover for the dark one.
Mechanically they are very strange, the write protection is oddly cast, probably defectively.
Instead of screws there are some strange things.
But the tape is extremely powerful, definitely a superferro with a high MOL of more than +4db, and extremely crisp highs.
The packaging on the superferro claims that the tape is a Magna MAX III West Berlin.
Didn't we just say here that Magna was buying the tape from England?

Regards EZ