valve covers on a vintage Hampton Amusement park ride car since the early 70’s. Hampton Rides was a flat ride manufacturer that operated from 1942 to 1993

https://www.facebook.com/photo/?fbid=26804782762495570&set=gm.4634557700154805&idorvanity=2695731877370740 https://isewcute.blogspot.com/2009/10/wordless-wednesday-carnival-at-twilight.html