Help with old expired negative exp/dev

Hi all! So, I tried an AZOCOPY DN - 3 negative copy film, very expired I rated at iso 25 as I don't find info about its real iso. Also exposed it with plus 2 exposure compensation and developed in HC 110 dilution F for 10 min (my approximation as I did not find info about) with 2 inversions at every minute. As there are many variables I wonder if the outcome is from over exposure or from underdevelopment, what do you think?

Thank you!

AndreiF said:

As there are many variables I wonder if the outcome is from over exposure or from underdevelopment, what do you think?

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I'd first exclude the possibility of severe underexposure with material that's (1) old and (2) not intended to act as a recording medium.

It might help to see a photo of the actual film negative instead of an inverted scan.