These beads are such a departure from typical Chinese glass, I wonder why they are attributed to China (?). They look much more like Czech glass. Molded from preformed rods and then faceted. The style of necklace is certainly 1930s to '40s in my opinion. It would be easier for me to suppose these were Japanese, made in a Czech style, if they are not Czech. However making faceted beads was not typical of the Chinese nor Japanese—though I suppose they could have done this for export products.
The recent avalanche of faceted Chinese beads has been surprising to me.