What can you tell me about these wrenches?

[Yooper Farmall]

IHC wrenches I recently picked up. What were they used for, why the curved shape, were they originally painted IH red?

 

[Michael Soldan]

I think they are grain binder wrenches. One wrench designed to fit several bolts or adjustments,took up little room in the metal tool box by the binder seat.
 

[Rick in Iowa]

thanks micheal. i have a couple but never knew what they were for.worth anything?
 

[LenND]

I think Michael is right. But they may have fit more then one implement. Everything had square heads and nuts so the wrench could fit many things. Len
 

[Tom Fleming]

I looked this up in the IHC wrench listing I have. lists it as "S-wrench", ok, like we don't already know that.

My guess (as others have posted) is that it is either a binder wrench or a grain drill wrench. P&O made most of the plow wrenches and are marked P&O.