Courtesy of the folks at the CIA, from 1962 a translated copy of the Soviet Union's tube data handbook, with a chart of Western equivalent tubes. It's 690 pages so it'll take a while for the whole thing to load.
https://www.cia.gov/readingroom/docs/CIA-RDP80T00246A063400150001-1.pdf
More Soviet-era tube-related CIA documents here:
https://www.cia.gov/readingroom/search/site/tube
https://www.cia.gov/readingroom/docs/CIA-RDP80T00246A063400150001-1.pdf
More Soviet-era tube-related CIA documents here:
https://www.cia.gov/readingroom/search/site/tube
