The all chrome style is all I'm aware of for 64 1/2. Aside from personal experience in the hobby, a good reference if you do not have a copy is a book by Colin date, Original Mustang 64 1/2 - 66. Although there is only one buckle style, I've noticed a few variations in the way the ends of the belts are sewn together where the buckle and metal tabs are attached (see pics).