Translation Help

[desantnik]

So here "it" is. A Military ID from the 1920s.

What exactly does the cover indicate?

Eric, the cover says "Workers of the World, Unite!" at the top and at the bottom is written "Red Army Man's Service Booklet" with a "Red Army Man" meaning enlisted, not an officer. A "private" was called a krasnoarmeets "Red Army Man" in the early days of the Red Army, then gradually became "ryadovoi" (private) as the Red Army changed its name to Soviet Army.

The "krasno-" you see in Russian means "red" as in Red Army Man and "Krasnodar" in Echoes.