First stamp in Indochina

First stamp in Indochina

First stamp in Cochinchina

The 1889 unification of colonial administration first resulted in surcharges in January 1889, on the 35c French Colonies stamp, reading INDO-CHINE 89 / 5 / R D (8 January) and INDO-CHINE / 1889 / R - D (10 January), where the "R" referred to the colonial governor P. Richaud, and the "D" to the postmaster at Saigon, General P. Demars.
The example illustrated on right was canceled at Vinh Long, a town of the Mekong Delta, on 4 April 1889, just a few months after the stamp was issued.

Reference:
Wikipedia. 2020. "The First Postage Stamp." Last modified April 17, 2020 (9 May 2022).

Nguyen Thi Thuy Duong