b15-prl107-Vintage Japanese natural color freshwater rice pearls 5x3mm avg, 16 inch strand

From a dealer's estate: These strands of natural color freshwater rice pearls were purchased in the mid 1970s and have "Product of Japan" tags on them. The lake Biwa pearl industry was coming to a close in the mid 1970s. but I don't have any history of these other than the tag and the time purchased. They have a nice luster average 5x3mm, and come in 16 inch strands.