Nice original hopper top from a 1 1/2HP rock island hit & Miss Engine. I believe this will fit the 1HP tagged engines as all but please measure yours to verify! Comes with a nice original brass tag. Serial #A91597 Has some traces of original yellow paint. Bolt hole spacing is 6 1/8″ by 5 5/16″ on centers. Please see pictures for the absolute best description. Antique Rock Island Hit Miss Engine Water Hopper Top 1 1/2HP Alamo Empire.