Many times the cold war bimbo programs ended up marking their bimbos by category or some other demarcation. Many of these systems have been lost due to the secret nature of the programs, but even so evidence that they existed at one point still exists.
For example, the above cold war bimbo has clearly been marked as a one star unit via it’s hat. Where that fell in the categorization of the programs bimbos is something that we may never know.