Up for sale is a original cylinder from a IHC Aircooled Tom Thumb hit & Miss engine. Good spark plug threads. Good fan assembly threads. Good cylinder Oiler threads. One fin is chipped. No other breaks or welds. 3 11/16 cylinder bore. Valve chest area looks good with minor dings to where the gaskets would seat, very usable. Please read and see all pictures as I’ll do my best to describe it!! When looking at the back of the cylinder (where part numbers are located) from the edge of the skirt and into the cylinder about 4 inches or 3 fins in, the cylinder walls look great. After 4 inches in, the walls have pitting clear to the front of the cylinder. Also, where that 4inch mark is (or 3 fins in) there is a deep groove that is at the bottom of the cylinder and is around 2 inches widespread at the bottom area. It is a rather deep groove and I’m not sure if it’s from rust or water damage but it certainly will be an issue with the rings of a piston if something isn’t done. Sorry for the confusing description and hopefully some of it makes sense. Please see all pictures.