Soviet Icebreakers - 5.

Icebreaker "Sadko".
Ледокол "Малыгин".
Jäälõhkuja "Sadko".

1959.

Ярославский СМХ ф-ка "Маяк".
Jaroslavli tikuvabrik "Majak" (Majakas).

* "Sadko" (1912-1941) was a Russian and Soviet icebreaker ship. She was named after Sadko, a hero of a Russian bylina.  - Wikipedia.