I know we disagree on the source of these millefiori weightss, but I would not expect to find a China mark or label on most of my Chinese weights. It was not a requirement in Europe - only in the US. We have got over 100 Chinese weights, including our Chinese Whites, and not one is scratch signed. Two have paper labels - a small red lampwork flower design, and a Chinese White - and both of those were purchased in the US. If you have unmarked ones, they could be pre-1929, of course.
Even if the weight are not Chinese, I just don't see these as 'Bohemian'. All the Thuringian and Silesian weights that I have seen have flat bases, usually fine ground rather than polished (except for the high quality antique Boho weights from Josephinehutte etc). The weights discussed in this thread have had there pontil mark smoothed by grinding on a wheel, leaving a concave depression, sometimes very irregular in shape, yet often quite shiny, just like Chinese Whites.