Picked this one up the other day. Measures 7 1/2 inches long. Didn't know if you have seen this one before. If not then here it is.

A better picture.

Mower?  Cultivator?  Binder?  Corn planter or some such, unusual to see one with all the *ears* still attached, they had an endless variety of tools back then.  Nice.

Don't think I have seen that one before. Neat wrench.