Antique farm equipment found in Barn...What could it be??

[REStracTORATION]

It is the drawbar. If you look closely at the front of the machine you can see a C shaped steel channel which the shaft fits into. I would suggest the shaft is for 2 horses one either side the shaft and the horses support the front of the machine so no need for front wheels.
Looks in such good condition lt should be on loan to a working horse museum.

I do agree with the museum part

 

[solo]

The second picture looks very similar to a blackstone's potato digger that was used here. This picture is not too clear but looks to be a later version of yours. It is listed in the 1937 farm auction where my great uncle had to purchase it from his father and again my father had it as an ingoing on the tenancy. Photo 1960's

 

[tomlad]

I've a lifter bit like them
Pto on mine tho
Trailed

 

[startinghandle]

I would say it was pulled by horses so very slow moving forward.. there is a big gear on the land wheel which is driving a small wheel so the mechanism would be going fast not much wear on the wheel lugs.. probably took a lot of pulling with that gearing do not scrap it