Rollfast or Elgin?

[Fat Willy]

Hey guys! Picked this up last week. Can’t quite make out what it is. My guess is that it is a combination of the brands mentioned above. Any help dating it and deciding on a brand would be helpful.

Thanks!

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[Archie Sturmer]

The chain ring sprocket is a Rollfast part.
The straight stout bridge at the seat post cluster triangle looks like a Shelby feature?
There have been discussions on the peculiar fork /crown before.

 

[Kickstand3]

Mercury Guard