Cups were manufactured in three sizes by Mori Yoko workshop in Mukden and Dalian https://asiamedals.info/threads/badges-labels-and-marks-of-mori-yoko-workshop.20422/
All known cups bear two marks: "純銀" /pure silver/ and "Mori Yoko".
cup with imperial seal of the emperor of manchukuo
imperial seal of the emperor of manchukuomanchukuosilvercupmanchukuosilvercup with orchid flower
mori yoko workshop
森洋行
森洋行謹製
満州国バッジ
満州国溥儀勲章徽章