These are real photo postcards and would need to be first identified and dated to tell if they are in fact pre-WW1 cards and from Russia.  Without seeing the actual fronts and backs of the cards it isn't possible to give a definite answer. However, most postcards were printed in Germany prior to 1915. Every country had its own postal regulations for the design of their cards but the presence of English written letters on the cards isn't necessarily an indication of where the card was produced. Imperial Russia belonged to the Universal Postcard Union and would have had more than one country's name printed on the card. But, even then, there were independent producers that did not have markings on the cards. You can see that this is a complicated question and more information is needed to properly answer it.
Ava (Sherlock) Cohn
Barrington, IL