The USSR was pretty good at copying western tech and calling it their own. And they'd mass produce the shit out of everything, for the military, for civilians, everyone would get the same thing.
This was the same era when Sweden spent an insane amount of the national economy (like 5%) to develop and build a very large number of Draken and Viggen aircraft in order to defend Sweden in case the Soviets decided to invade.
Do you recognize this ring sound?
[1] https://upload.wikimedia.org/wikipedia/commons/c/c9/Ericsson...
It does seem to be an export variant however, as the Swedish pulse dial system had the number 0 first: https://upload.wikimedia.org/wikipedia/commons/c/cb/Dialog_1...
As an anecdote this is why the emergency number in Sweden used to be 90 000, in the dark or in a smoke-filled room you'd be able to feel your way to the last number(9), and then pull four short times from 0 to the finger stop to get emergency service.
https://en.wikipedia.org/wiki/Ericsson_Dialog (1964)
Was there a soviet-era clone of this phone? Or maybe Ericsson (Sweden) actually exported this to the Soviet Union during the 70s? That metallic red facia/dial cover thing looks decidedly non-scandinavian-market.
After tearing one down as a kid in the 80s I can attest to its mechanical robustness; I can certainly see why the soviet military would pick this model for their new submarine class in 1976.