Is it a normal marking of the chip?

hello all,

I have a question about IDT product which part number is 9DB433AGLFT.

The first lind of  the marking is GR20858 while the secend line is 2117.

Is it a normal marking of this chip?

In addition, they have a different x-ray image when another marking is "GR20549PY 2113".

Thank you for reading my message and give me a help.

Have a nice day!

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