Clarotype bottle

I found this old bottle -- which still has its label, and the little cloth swab attached to a wire inside -- among my late mother-in-laws things. She was a school secretary and probably got this when they tore down the old "Indian school", Osage Elementary, (Oklahoma) way back in the 50s or 60s. My husband says he remembers seeing it his whole life and he was born in 1961, so she had it before then. It is pretty much self-explanatory but it would still be interesting to hear what others may know about it or the company that produced it. Its a lovely little bottle in its own right, I think.