Typewriter Predicament! :T

So I've got this Sears Celebrity typewriter sitting here in my room and I can't for the life of me figure out what kind of ribbon it takes. I've searched the internet high and low and have come up with nothing. Now I'm looking to all you lovely people for a little help hopefully... :)

What I know about the type writer:

Name: Sears Celebrity Cartridge

Model #: 8E

Made in the US by SmithCorona

Circa 1974-1975...

If some one could take a look at the pictures and tell me what kind of ribbon this bad boy takes that would be fantastic! Please and thanks :)

http://imgur.com/a/xuyOC