Can anyone Identify this early frame?

I picked this frame up last fall, but can't figure out what it's from? the "C" channels are backwards and the spring mounts appear to have been 1/4 ellptics at an angle? The rear spring mount looks like a casting or forging? not sure. Any help would be appreciated. (Frame is upside down in the pics)

 

How long is it?

 

I'll guess Overland.

 

1920s Overland,clue is triangular front spring.