Picture of a Fake LM3886 (not sure yet, but probabily it is!)

[Bazukaz]

Somewhere in the Forum an ex-National employee confirmed that the die is inclined as in your first photo, because that was the only way to connect the pins to the die.

Would be interesting to know, what the second IC is. Probably some TDA, and if you knew the pin layout, you might might even build a working chip amp with it.

Will they give you your money back in the electronics store?

I have had a few long discussions with electronics store, but finally they agreed to return money from already soldered chips(what they do not normally do) after I showed both original and questionable parts disassembled.
Already have my amps working and waiting for MiniDSP for active setup 🙂.

 

[AndrewT]

I have had a few long discussions with electronics store, but finally they agreed to return money from already soldered chips(what they do not normally do)

Good customer service deserves to be rewarded.
Name the company and maybe all our local Forum Members will give them some business.