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Are these components counterfeits ?

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Regnum

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Hello Everybody,

I have a batch of TLP281 optocouplers suspicious of being counterfeit.
These components have a code printed on top, just over a different code that is engraved on the package.
A layer of paint stands between both codes, but the etched one can be visualized with the help of a microscope after rubbing the top surface with a carbon pencil.
I attached microscope images where it can be easily checked (printed code at left, etched code at right)

Can you help me to determine if these components are really original ?.

Thanks,
Regnum

optos.jpg
 

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