How to find Centurion model name from serial number

Hello I am new to posting in a forum so please forgive any lack of etiquette, it's unintentional.

I have a Centurion bike that I purchased in 1978 or 79 and paid around $850 for. It is a tall frame, black, with quick release wheels and Suntour derailleurs. The serial number is N8A5975, any idea...