Cat - while you are correct in your info about the original Elgin company, you are wrong to attribute that company with this machine. It IS made by Free, and they have identical machines out there under other names. Free was one of the last US sewing machine companies, and ended up with a lot of "names" from buying out others (like New Home).
That is one thing newbie collectors need to be very careful of - as uniformed and unscrupulous sellers will claim thier machine is something it is not - because of the name on it.
This is the "New Home" version of the same machine
Florence is another name that once was a company (not the same as New Florence) and then White ended up with the name, so the Florence Rotary is made by White. New Leader got used by more than one company, but it's not the same as the original Leader Company.
This machine is not all that old, probably 1930-1940 era.