PGA300: About IC marking

Thank you for your response.
The other items I purchased have LOT numbers (10 digits) as shown in the picture. The one you answered is 7 digits, what is the difference?

The packaging can be a reel of 250 pieces or a reel of 2500 pieces, but is there one type of IC marking or LOT in one packaging or reel?
We would like to separate the cases that have slightly different characteristics depending on the IC marking (or manufacturing LOT).

We appreciate your prompt response.
Are IC markings and LOT numbers one-to-one?
In other words, is there in principle only one type of IC marking in one package (reel)?

(If more than one is mixed, it will be noted on the package.)

Thank you very much.