Hi, the book says N800000-N899999 was made between 1980-1983..So your gun was probably made some time in 1982.
Now welcome to the forum, hope we can help you with everything you need, we only ask one thing in return....SHOW US PICTURES OF THE GUNS!!!!!
We all love pictures here. We dont care if the gun looks like it was used and abused or new in the box. WE JUST LIKE PICS.....