Updated the blog post on agate and carnelian necklaces with cloisonne accent beads, upon receiving permission from this eBay vendor to describe a necklace he recently sold.

His client's mother received the necklace from her father, who purchased it while he was working for the German government in China in the 1930s.

This seems to me to push the envelope for nice Chinese cloisonne beads further back than the early 1970s.