Missouri would do it. They likely would not have been ordering/receiving from Spalding, etc. at that time (1890), so would have needed rural construction, and yet they would have been aware of the trends of the time, rounded and experimental knobs. I would say circa 1890, made in the area in which it was found. Either an advertisement piece, or an actual large bat.
As Crocodile Dundee would say:
http://www.youtube.com/watch?v=owblwAwUJR8