Understanding the vintage Otto Link...

So I got my hands on an old Otto Link the other day, but I can't tell what kind it is. I mean, I know it's a Super Tone Master and it's certainly pretty old, but, how does one tell if it's a Florida, Babbitt, etc.? Are there comparison pictures out there? I don't have the original box and there are no numbers on it, just U.S.A written below the table on the shank, and then 5*.