Hi Gferdon
If you still have both spools as pictured for your typewriter, simply wind any ½" ribbon onto your spools. These LC Smith typewriters have a proprietry drive system for the spools and regular universal 2" spools will not work on these machines. The spool you have pictured was used on many of the Smith-Corona desk-top and office machines right through until the 1960's and possibly later. Hope this points you in the right direction,
Sky
We humans go through many computers in our lives, but in their lives, typewriters go through many of us.
In that way, they’re like violins, like ancestral swords. So I use mine with honor and treat them with respect.
I try to leave them in better condition than I met them. I am not their first user, nor will I be their last.
Frederic S. Durbin. (Typewriter mania and the modern writer)