Pair of millefiori doorknobs, with very simple (mainly whitish) canes.
Diameter appr 5.3 cm. Heavy, massive brass stem.
A total mystery to me, I couldn't find anything similar in my books or online.
My best guess is post-classic period (1890-1930), but I may be completely off track here

Ah, and I bought them from France, don't know if that does indicate anything...
Thanks for any help!
Michael