A few look ancient. But they mostly appear to be reproductions—and therefore recent.
The applique is not a "murrine." (The singular would be "murrina.") This is just a trailed spot.
The easiest guess is that they are Indonesian. I know, for certain, that Javanese beadmakers have imitated black-&-white folded beads, placing a white band around them. (As seen in your photo.) The ancient prototypes are folded. The Indo-imitations are carefully wound-&-trailed—but look pretty good.
JDA.
Thank you for your answer and your explanations.
