IMO, that is not what 2 mags taped together look like.
On vz58, there is no way you can tape mags side-by-side
without spacers between them, because they don't fit into the receiver.
Actually, there are very few guns in the world
that allow you to use side-by-side mags without spacers.
If you don't want to use spacers, you HAVE TO tape them in "69".
So, where is the second mag's tip (lips) in that pic???
And more important for me, where is the spine of the mag(s)???
Huh?
While I have no doubt that there is a single mag in that pic,
I do not try to convince anybody of that.
However, the question that bugs me is
what kind of mag is it?
I see no spine under that tape.
The tape is not very thick or very stiff
since I can see some of the ribs on the sides.
But it is also possible that the light and angle in that pic play tricks
and make it hard to see the spine.
Here is a bigger pic posted by Deckard in post # 2121
(and it turns out that there were a couple of posts
questioning that mag at that time as well).