A historical French Indo-Chinese envelope used with both postage stamps and stamps from ports. This image illustrates the usage and travel of mail / post from colonial Việt-Nam.
Various authors (most symbols by the government of French Indo-China).
<ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/FRENCH-INDOCHINA-1894-ALLEGORY-5c-STATIONERY-ENVELOPE-to-GRENOBLE-SAIGON/284078935950?_mwBanner=1&amp;_rdt=1">FRENCH INDOCHINA 1894 ALLEGORY 5c STATIONERY ENVELOPE to GRENOBLE.. SAIGON - £15.00 Approx $20.73 - £2.65 ($3.66) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul><ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/INDOCHINA-EXHIBITION-CANCEL-1948-SPECIAL-PRINTED-ENVELOPE-10c/152668778692?_mwBanner=1&amp;_rdt=1">INDOCHINA EXHIBITION CANCEL 1948 SPECIAL PRINTED ENVELOPE + 10c - £65.00 Approx $89.83 - £3.75 ($5.18) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul><ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/INDOCHINA-to-ADEN-CAMP-1917-WW1-SAIGON-PORT-PRINTED-ADVERT-ENVELOPE/274638811705?_mwBanner=1&amp;_rdt=1">INDOCHINA to ADEN CAMP 1917 WW1 SAIGON PORT PRINTED ADVERT ENVELOPE - £75.00 Approx $103.65 - £8.50 ($11.75) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul><ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/FRENCH-COLONIES-INDOCHINA-1939-20c-18c-AIRMAIL-LANG-SON-AIR-FRANCE-ENVELOPE/161256008437?_mwBanner=1&amp;_rdt=1">FRENCH COLONIES INDOCHINA 1939 20c + 18c AIRMAIL...LANG SON..AIR FRANCE ENVELOPE - £25.00 Approx $34.55 - £3.75 ($5.18) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul><ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/INDOCHINA-1940-AIRMAIL-HONG-KONG-CENSOR-VICTORIA-L-GAMBY-CHEMIST-ENVELOPE/151387909597?_mwBanner=1&amp;_rdt=1">INDOCHINA 1940 AIRMAIL HONG KONG CENSOR + VICTORIA...L.GAMBY CHEMIST ENVELOPE - £125.00 Approx $172.75 - £3.75 ($5.18) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul><ul><li><a rel="nofollow" class="external text" href="https://m.ebay.com/itm/FRANCE-INDOCHINA-1931-REGISTERED-HOC-YEN-CHEONG-PRINTED-ENVELOPE-INTERPANNEAU/161441803766?_mwBanner=1&amp;_rdt=1">FRANCE INDOCHINA 1931 REGISTERED HOC YEN CHEONG PRINTED ENVELOPE + INTERPANNEAU - £65.00 Approx $89.83 - £3.75 ($5.18) Shipping</a>, <a rel="nofollow" class="external text" href="https://m.ebay.com/">m.eBay.com</a>.</li></ul>