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LM158: Device marking of "LM158JG/883B"

Part Number: LM158

Hi Team,

One of my customers want to confirm whether the atteched is the TI's real product.
If yes, what is the part number of Device marking of "LM158JG/883B"?
What confused us is that we can find device marking of "LM158JG" but can not find "LM158JG/883B"
on TI's website.

Beat Regards,
Tom Liu