I have some very similar beads in my collection. They are from the African trade and presumed Venetian. But as usual in the bead history biz, we'd need to find some evidence for Venetian beads being traded to Borneo before confirming this one way or the other.

Bear in mind that some Venetian beads were tumbled to change the surface to a semi-gloss or satin finish, while other beads, particularly for the European jewelry trade, were left with a high gloss. I have some of the high gloss beads and they are identical to beads sent to Africa, and seem almost "too good to be real Venetians". But that's because 99% of the beads I've examined in person are not the high gloss versions.