Swartz Ink-Montgomery Ward Signature 100, Signature 400, Signature 500 and Signature 811D Typewriter Ribbon, Black, Compatible, Twin Spool

I haven't had a chance to put it in the type writer. It looks like it fits. I just need to clean the old type writer up and try it. Nice, my teen wants to see what an old type writer is like.

Can be spotty at times, but it works.