Unknown disk and crank

[1817cent]

I was going through my garage and found the disk and crank below. Does anyone know what they may be from? Thanks..

 

[Rust_Trader]

Columbia (Pope)?

 

[Cowboy in NC]

Indeed...----Cowboy

 

[Krakatoa]

Certainly Columbia/Westfield.

Does it have a pin from the crank to index a hole in the ring? I can't tell from the image. If not it is of the DD type where the crank and ring have an oval shaped shoulder and hole that index.

 

[catfish]

Yes. Columbia / Westfield.

 

[Archie Sturmer]

Westfield double-D drive, (likely 20-tpi coarse threads); we see daylight through the 5th rounded-triangle hole.