This is an interesting set of items. The first two are xeroxes of copies held by the Racine Heritage Museum. The last is an original which has not done well through the years. Based upon the clothing styles of the workers, the year would seem to be approximately (within a decade?) the same.
The original has just enough more detail on it to be able to better identify what this is - it is a casting of some sort of base. The parts on the floor are the folded down sides for the casting. By looking up form 718 in the form index, we see that this is a photo of a #2-B cutting off machine; the 2-B is the "small" 6" model. The photo is likely from 1915, when form 710 was published.