Takumarology lists M42 lenses in order of their observed serial numbers. (It's under Collection)
The historical accuracy of this data will be updated, regularly.
An article following this list gives insights into 1.4 / 50mm lens developments.
It’s not photography; but interpreting history, and as challenging?
Thread mounted (M42) Takumar lenses are native to Asahi Pentax cameras. I used Takumars in field biology from 1972. I hope my research interests you.