Antique A. J. Nellis  patented 1870 Cast Iron Grapple Hay Hook Trolley Part. I'm pretty sure this says A J Nellis & Co. Pittsburg PA-but its really hard to make out. I can definitely make out Patented March 1 1870. I did not clean it up -it's exactly as I found it. Moves freely and I do not see any cracks or repairs. Any ?'s please ask