The Soviet lenses and cameras were produced in various factories disseminated all over the territory (it was the case for all that was manufactured in the USSR). Except rare cases, they show a logo making it possible to identify the place of manufacture, several factories producing the same model. These factories are now independent companies, some keeping an activity in photography, others completely changed activity.
I indicated for each lens it's factory logo. Take care: it does not mean that all lenses of this model come from there, some were simultaneously or successively produced in several places. The logos page indexes those quoted here.