Some libraries seem to have copies of the instruction manual (not online, though): https://www.worldcat.org/title/instruction-manual-for-use-with-the-labanotat

Some libraries seem to have copies of the instruction manual (not online, though): https://www.worldcat.org/title/instruction-manual-for-use-with-the-labanotation-ibm-selectric-typewriter-element/oclc/6230205 https://www.worldcat.org/title/instruction-manual-for-use-wi...