we just had a long online conversation about exactly these beads- it may still be on this page- search for "Boshan Beads"
Two searches that should help identify these beads:
http://beadcollector.net/cgi-bin/anyboard.cgi?fvp=%2Fopenforum%2F&tK=boshan&wT=1&yVz=yTz&hIz=3000&hJz=1&cmd=find&by=&xcfgfs=tK-wT-yVz-aO-hKz
http://beadcollector.net/cgi-bin/anyboard.cgi?fvp=%2Fopenforum%2F&tK=JRJ+peking&wT=1&yVz=yTz&hIz=3000&hJz=1&cmd=find&by=&xcfgfs=tK-wT-yVz-aO-hKz