Coffee Table: Superimposed Stills From Early 20th Century Russia

I found these images accidentally earlier today while browsing through a few photography forums. Very impressive photo-montages here of what is most likely a Stalin-era Russia. Couldn’t find any information on who the photographer was or what techniques were used, but I’m guessing that the series of pics that were taken in the same spot were each developed then printed onto the same substrate, using front-end projection to ensure the registration on each one was perfectly aligned. This style was used in a number of Russian propaganda pieces in those times, however in this case it looks to be purely creative as there isn’t a crystal clear message here.