LD Ribbon (T677BR, compatible with Olympia) are good ribbons Joe Van Cleave recommends as being inexpensive for about a $1 per spool from Amazon. Although they're DIN spools compatible with Olympia machines, he's used them in his Smith-Corona Galaxie 12. [timestamp 20:37}(https://youtu.be/fwk1jTH5bLA?si=QePpvzF_o80Yq6T3&t=1237)