image by Mario Fabretto
This is the president's standard of South Vietnam between 1955 and 1963 (Nĝo Dinh Diem). The inscription should mean "duty and sacrifice."
Date: c. 1955 - c. 1963
Proportion: unknown
Use: president's standard
Source: archive CISV
Accuracy: good
image by Randy Young, 8 April 2016 Source:Wikipedia
Presidential flag (1955-1975) (flag of the President of the Republic of Viet Nam as Supreme Commander of the Military Forces) Esteban Rivera, 13 February 2016