It appears to be a close match to the Supertone, under "Ukuleles by Other Makers". In particular, the headstock, fretboard extension, and bridge/saddle shape are the same. A listing by reverb.com for a sold Supertone described it as circa 1920, likely made in Chicago. The one on reverb also had the same inlay on the fretboard. I'd love to stumble across one of these in someone's attic. Amazingly good shape for an attic find.
Mike