This product was publicly known; it was called Lotus "1-2-3/M" and you can find a little information (not a lot) by googling for that name. The Wikipedia articl

This product was publicly known; it was called Lotus "1-2-3/M" and you can find a little information (not a lot) by googling for that name. The Wikipedia article for 1-2-3 also cites a few scanned articles from the time, although sadly they also have some broken citations here.