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.