In the scene that shows the report from Russia in TV, you see a short time a map of Russia and on the point where Saint Petersburg is, there is written in cyrillic letters "Petrograd". This is the name of the city 100 years ago!!!
I hope you understand that the name Petrograd is not as old as you might think.
The name Petrograd was introduced in 1914 by Tsar Nicholas II as St. Petersburg was to German, due to Russia being in World War I and the name remained until 1926 after the death of Lenin