Thank you all! Ah ha, believe those mentioning it being a 66-1 are right...checked the copyright dates in the manual and the latest was in the 1930s. According to the serial number which was G-something it dates to 1921.
According to the seller the machine belonged to his grandmother who had a men's clothing store. It largely is in good shape, with one area of wear from use on the decals which I don't mind as I see it as part of the machine's story. Might do some very minor work restoring the cabinet's finish.
Someday I'll have to get the Lotus and Tiffany decals...there are so any beautiful variations!