the clips work for the 3/4T too - if there's another ring right around the cap [can't really tell], it's something home-rigged, prolly to hide the fact that he's using wrong later rims that have the built-in bumps for the later style hubcaps
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics