Piston and rod removed from a hit & Miss Nelson brothers engine, typically tagged as a 1 1/2 or 1 3/4HP I believe. The wrist pin and bushing is very badly worn and sloppy!! It will need replacing or less you like to heat clunking and banging!!!! The rod bearing also appears to have been repaired with what looks to be leather, I imagine for best results a new Babbitt bearing will need poured. I think it is a broken off grease cup fitting In the hole that oils the rod bearing. Piston is 3.5 in diameter. Please see all pictures for the absolute best description and more measurements. I do not see any breaks or welds on the piston or rod. This item is over 100 years old and is not new!!