From a newbie to a newbie : welcome to Colt Country !
You have two rarities there : a 36 caliber Dance and a half fluted 1851. I expect the Dance is a Pietta, is it not ? Regarding the 1851, I also have an half fluted one, but it also has a lanyard ring on the butt. Is your half fluted cylinder original to the revolver or did you swap it ?