John:
Thank you! I did check the vintagejapansewingmachines Yahoo Group. I searched their messages and photos. I found a couple of people with a very similar machine, different names as you said. One was a White 670 Streamliner (although I've seen another 670 Streamliner that didn't look anything like mine) and another was Hamilton De Luxe Zig Zag machine. All had model TAZ on them. I got a couple of the free manuals too. At least that's better then no manual!
Thank you,
Katrina