John Chadwick recognized the Linear B supersyllabograms ZE & MO:

chadwick reading the past linear b 37 ZE zeugesi

chadwick reading the past linear b 38 MO mono

It is quite obvious from the excerpts above from Chadwick’s masterful, Reading the Past: Linear B and Related Scripts, © 1987 that he clearly recognized the supersyllabograms ZE, corresponding to (archaic) Greek zeu/gesi = yoked and MO mo/noj = single. This being the case, it is also more than likely that he was aware of the existence of at least some of the 39 supersyllabograms in Linear B, and this is significant, because it was he who first latched onto Michael Ventris’ amazing discovery in 1952 that the Linear B syllabary was in fact the script of a very ancient and archaic Greek dialect, which we now know as Mycenaean. This raises the question, did Michael Ventris himself know about supersyllabograms? Brilliant as he was, I am greatly inclined to believe he did, but his untimely death at the young age of 34 in a terrible car accident in 1956 never gave him the chance to further develop and refine his initial decipherment of Linear B in 1952. So we shall never know. But very the idea that he may have known is truly tantalizing.