I remember reading somewhere that Eldredge made the first Two Spool before the company name changed to National. And I was sure I saw a picture of it and it's a bit different and a lot harder to find. But I can't find hide nor hair of it now! I only meant it'd be fun to own a really old one, not that the machine is funner to operate.
I know my "The Eldredge" is a later model made by National, and is the same as the "National" Two Spool. Mine has a Certificate of Warrenty from 1935. DH and I are the second family to own this machine.