Soviet Icebreakers - 6.

Icebreaker "Admiral Makarov".
Ледокол "Адмирал Макаров".
Jäälõhkuja "Admiral Makarov".

1959.

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

* After service on the Greenland Patrol, and assisting USCGC Eastwind in capturing the German weather ship Externsteine, Southwind was transferred to the Soviet Union on 23 or 25 March 1945 as part of the Lend-Lease Program.  The ship served in the Soviet merchant marine under the name "Admiral Makarov", (named in honor of Stepan Makarov) until being returned to the U.S. Navy on 28 December 1949 at Yokosuka Japan. - Wikipedia.
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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.

May 1, International Workers' Day - 3.

May 1 - International Workers' Day (Labor Day).
1 мая - День международной солидарности трудящихся.
1. mai - töörahva rahvusvahelise solidaarsuse päev.

1960.

Алтайский СНХ ф-ка Бийская.
Altai tikuvabrik Biiskis.
Брянский СНХ ф-ка "Ревпуть".
Brjanski vabrik "Revput" (Revolutsioonitee).

May 1, International Workers' Day - 2.

May 1 - International Workers' Day (Labor Day).
1 мая - День международной солидарности трудящихся.
1. mai - töörahva rahvusvahelise solidaarsuse päev.

1960.

Алтайский СНХ ф-ка Бийская.
Altai tikuvabrik Biiskis.
Брянский СНХ ф-ка "Ревпуть".
Brjanski vabrik "Revput" (Revolutsioonitee).

May 1, International Workers' Day - 1.

May 1 - International Workers' Day (Labor Day).
1 мая - День международной солидарности трудящихся.
1. mai - töörahva rahvusvahelise solidaarsuse päev.

1960.

Брянский СНХ ф-ка "Ревпуть".
Brjanski vabrik "Revput" (Revolutsioonitee).

* The date was chosen by a pan-national organization of socialist and communist political parties to commemorate the Haymarket affair, which occurred in Chicago on 4 May 1886.[6] The 1904 Sixth Conference of the Second International, called on "all Social Democratic Party organisations and trade unions of all countries to demonstrate energetically on the First of May for the legal establishment of the 8-hour day, for the class demands of the proletariat, and for universal peace." - Wikipedia.