From our side there is no way to know if a processor is being over clocked so it will depend on the customer decision.
You can identify if a processor is over clocked by running the Intel® Processor Diagnostic tool. This will diagnose the internal components of the processor and will generate a report.
Here you can get the Intel® PDT:
What I wanted to know was that is it possible to identify the OVERCLOCKING CAPABILITIES of the CPU from looking at batch number and/or serial number.
On another platform, a user post a question in which he posted batch number and serial number of the i7 4770k and asked if this CPU is good from overclocking perspective. I net surfed it and it came with so many persons collecting data on overclocked processors and arranging/sorting this data against the batch number/serial number of the processors.
Hopefully, this time the question is made even more clear
I am afraid to say that there is no way to identify the over clocking capabilities of a processor; however, I can say that all processor models that finish with the letter K have been designed for to be over clocked.
So in the case you are looking for a processor that can be overclocked, my best recommendation is to go for a K processor.