It was cash from the Nguyễn lords at the end of their existence prior to the Nguyễn dynasty was fashioned. Once the drop with the Citadel of Saigon, it turned the money of French Cochinchina from 1862 to 1949. It can also be useful to inquire others for opinions, like https://sethlooom.blogitright.com/36646296/the-best-side-of-sai-gon-list