Old thread I know, but I found a manual (PDF Scan) for this online and it's dated 1956. I'll link it here.
https://tinkerbeth2.files.wordpress..../01/morse1.pdf
I would just upload it to this board, but apparently I don't have permission to attach a PDF, or it's not an option. If someone can grab that PDF and then uplod it here, it'll help to prevent that one from disappearing forever.
Update: I was able to upload the PDF later. It is linked to this message at the bottom.