No, I'm just suggesting that the 2005 is probably not an N810 production date.

I don't have an N810 but might you be looking at a stamp on a chip? That may be the manufacture date of that particular chip... and unless the chip design changed there's probably nothing to worry about if you have one made in 2005 or 2007.

I seriously doubt any N810 boards were being made in 2005. Some chips on the board... maybe. But not the boards.