How th transformation is conducted
The gnomonical arrangement
Stems
In this diagram, you have, in the upper left ' the frame of the seventy stems'. The components separated in black and red letters. Them all parted stem-components in the six bricks of the frame are assempled into three bricks in the middle section of this diagram.
Reduced stems
Black letters are the concrete components of the reduced stems. White letters are the calculated missing components-
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The alternative arrangement
To the right. The six colored zones are identical two by two. You may argue against this idea, that the vessel is fragmentary in its left corner, but still it is recognizable as what it is. So is Venus de Milo.

If those seventy stems were the unexpected key to this old enigma, you would first expect some kind of correlation between the stem signs inside and outside of the stems; and yes, this was exatly, what was found.