The bag is pretty rare! With the introduction of the Model F, through the early Model G, Electrolux sold a series of bags with colorful advertising messages. There were about 30 different variation. I have all of them, I think. One of these days I'll have to pull them out and take some photos. I'd hang on to this one and not use it!
Would be great if you'd post some YouTube videos using your LX, especially with the polisher!! (That would have been the very first thing that I would have played with!) The polisher is pretty rare nowadays, despite a gazillion of them having been sold from 1949 through 1956. They don't turn up much anymore, especially with the original box!