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.)

[![enter image description here][1]][1]
[![enter image description here][2]][2]
[![enter image description here][3]][3]
[![enter image description here][4]][4]


  [1]: https://i.sstatic.net/Me3uo.jpg
  [2]: https://i.sstatic.net/i0FMd.jpg
  [3]: https://i.sstatic.net/d2obX.jpg
  [4]: https://i.sstatic.net/Goj3r.jpg