I'm not thinking it's new. Well not entirely. It may be a case where someone opened it up and didn't play it possibly. Old old early NES games weren't sealed, they had these little black circle stickers with print saying Nintendo on them and those had the attached hang tab your box there has. After that then you had the sealed up games and they had the plastic hang tab stuck onto the cellophane. Either way at least it looks to be in pretty decent shape as far as 25 year old boxes go. May be the lighting but it looks a little faded in front compared to the back and I think it's torn up there on the top.

I'm not some CIB nut though, I just like having a good quality condition game, and if I can get the manual tossed in as it should be, or with little added cost I'm happy.