Please help me identify this tandem bicycle. Here's what I know: 
-- I'm pretty sure it's not a Schwinn, as all Schwinn bikes had straight frames without curves.  
-- From what I can tell, Hawthorne used the same skip-tooth sprocket on Hawthorne bikes until the early 1950s.  
-- It has lines like a Colton, but I can't find out if Colton made a tandem that front steer only.
-- The serial number has been painted over/obscured.  
-- Seats not original.
-- It has fenders, not shown.
-- Not for sale at the moment.