This led me to this declassified document according to which Soviets used a mix of color codes and directly stamping values on resistor housings: https://www.c

This led me to this declassified document according to which Soviets used a mix of color codes and directly stamping values on resistor housings: https://www.cia.gov/library/readingroom/docs/CIA-RDP80-00809A000700030074-5.pdf https://www.cia.gov/library/readingroom/docs/CIA-RDP80-00809... The document is from 1950 though, so it greatly predates the standards used the 1983 Soyuz here.