Jamey Allen's opinion regarding these beads is as follows:-
Rosanna's reply to your question is correct. These are not hot-pinched beads. However, it's not impossible they were made in Holland or England, at the same time such beads were made at Venice. From the 17th C.

It is also true that, when new, a-speo beads would have been shiny (unless treated to not be shiny). But, MANY beads from an African context have lost their shine, a long time ago. Africa, as an environment, is unkind to glass.