Both of mine were made in Vietnam, both of them were Midnight Black. I've seen several display models now and all of them had the tint issue. All of them were made in Vietnam and all of them were black.
I also noticed that while the reddish tint on the edges might seem like an optical illusion, it isn't, as the extent of the pink tinted edges varies greatly. If it were an optical illusion, that shouldn't be the case.