Laos Indo-China stamps 1921 Registered Cover to Austria

Envelope bearing Indo-China Yvert 77, 6 on 15c violet (2) and Yvert 81, 14 on 35 olive tied by Xieng-Khouang Laos double ring with boxed registered, routed via Vinh Annam and Haiphong with Wien arrival. Fine item of registered mail from Laos.    ID: 35084