·    The glyph-block in question occurs as the very last one on the inscription.

·    This is a very rare combination – we look for where the conch-shell appears in combination with an AJAW using an MHD search on:

o “blcodes contains ZB1” (=AJAW) and

o “blcodes contains AA6” (=HUUB/“conch shell”).

yields only one hit – the example given here. It resembles a YAX EG, though it seems to occur only in this one inscription.