細節
cover MENGTSZ: 1902 (24 Apr.) opened out envelope (faults) addressed to France bearing "C.I.P." 2c. and 4c. pair tied by fine strikes of the Mengtsz bilingual c.d.s. with, on reverse, French Indo-China 15c. cancelled by "LAO-KAI/TONKIN" c.d.s with Hokow and Hanooi transit c.d.s.