Note the precision with which the little motifs are placed.

Plus, they're so uniform, despite being so tiny, and lacking in seams, I wonder how they were made?

Two of the beads show the two-color petal infill, one in red and white, another in yellow with traces of green.

I don't think they're newer than the 1880s. The enamels seem a bit better than what was used before 1875, but not as good as what was in use in the 1890s. They seem far more carefully made than commercial pieces from the 1890s and after. So that's the 15 year time frame I'd put them in.