Prior to this, from 25 August 1940, the flag was red with the gold hammer and sickle in the top-left corner, with the Latin characters LPSR (Latvijas Padomju Sociālistiskā Republika) above them in gold in a serif font.
The Soviet-era flag was officially replaced on 27 February 1990, when the national Flag of Latvia was reintroduced (while remained legally as a Soviet republic until 6 September 1991), and its use at public events is now banned.
Flag of the Latvian SSR (1918–1920)
Flag of the Latvian SSR (1940–1953)
Early variant of the flag of the Latvian SSR (1953-1967)