By golly, there it is, number 15444. Thanks, Rosanna!

It seems to be of the opal blue bowtie variety?

After sorting through my pile of 300+ beads, I found about 30 that - as far as I can tell - match this bead and are in comparatively nice shape. Match criteria would be 1)thicker dark green stripe + 2) neatly made opal blue bowties.

Maybe 35 matching beads that are in OK shape.

I didn't count the matches on the strand of about 50 very worn beads that I culled from the pile, or the dozen or so crizzled bowties, but many might meet the above two match criteria. (pic attached)

At first I thought the beads with the plain dark sapphire blue bowties seemed to be in better shape, overall, but after re-examining them, I'm not really convinced of that. There are fewer of them, compared to beads with the opal blue cane.

I didn't see any pictures of these in Dubin, so am not sure what the basis of Panini's cite is, other than they're Venetian beads and the timeline for decorated lamp beads starts in early-mid 19th century, so they got lumped in with that group.