Seems the mind set of razor producers in the Soviet era was very similar to the mind set of western barbers when straight razors were allowed to be used. I don't ever recall seeing a barber here use anything bigger than about a 5/8 sized razor. It is all you need to do the job and is not as costly as the larger blades so they made more money from their labours. Also both knew pretty don't shave but costs money to do.
The soviet era consumer goods I have had and used seemed to have a lesser QC level than the goods made for military application. Even in military goods attention to the finish of components was limited to critical components necessary for the good function of the item only. Again, pretty don't make it function any better but just costs money and time to do.
Bob