1.b06, ZATU819? With the question mark included so they’re not sure that the symbol corresponds to what is anyway an unknown (ZATU) form. Double trouble. I checked on six other tablets and would say that ZATU819 is not even remotely similar. Anyway, the smaller head is placed after three symbols, GI-GI-SIN, two reeds and the number three, not a great help without digging a lot deeper.
To the right of the bigger head, it reads MUN-SU-PAP-NIM. SU is the symbol you were interested in; a pyramid with ladder, its meaning is ‘to sink’, but also ‘skin’ and even ‘to repay’. It is an extremely interesting symbol. MUN is ‘salt’ or ‘brackish’, PAP is perhaps ‘to estrange’ or ‘to wean’ (although it looks more like PA to me), NIM is the ‘flying insect’! but not only…. It would take a long and perhaps fruitless study.
There are quite a few TUR on this tablet, 'young' and 'to nurture', perhaps 'feed', and might link in with PAP. Then again, this could be a tablet related to offerings. The sign NI directly in front of the Egyptian style head can mean oil, thickness, perhaps the container which is full, plenitude. It’s possibly the same as those on the Warka vase which also appears to show a scene of offering.
The style of cuneiform on this tablet is of its time but, for me, this character has a distinctly Egyptian flavour…the profile with the goatee. Where else? And yet even integrated into the text.
Sorry not to post photos – don’t know how. Perhaps the kind doctor will oblige.