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Illustrations by Alexander Alexeieff for Tolstoy's 'Stories and Legends' (Pantheon, c. 1946)

From wikipedia:

Alexandre Alexeieff (1901–1982) was a Russian-born artist, filmmaker and illustrator who lived and worked mainly in Paris. He and his second wife Claire Parker are credited with inventing the pinscreen as well as the animation technique totalization. In all Alexeieff produced 6 films on the pinscreen, 41 advertising films and illustrated 41 books. [cont. reading]

See all Alexeieff posts on 50 Watts

6/7/2014 update: PK at BibliOdyssey asked his (other) friend Will if he knew what printing process was used. Will's response:

I'd say in this case that the originals were color woodblock prints rather than lithos or serigraphs.

If the original book edition was more than a few hundred copies [Ed: it was], by 1946 the original multi-block color prints could have been color photo-lithed with a screen printing process.

I'm guessing woodblock prints because the textures of the solid color areas and the line qualities of the Tolstoy prints are similar to a lot of 20th Century Japanese woodblock prints from the 'Shin Hanga' (New Prints) revival of color block printing in mid-20th Century Japan. I've seen a lot of those, and am also aware that there were parallel print movements in Europe, the US and Russia after the War.