Chris-here it's the core that tells where it belongs to!.Typical type I core that you can find also at the awarded variaton maker marked with "CD800"....But there's a type II,marked with the "square" or with "800"...Or from the beginning-one awarded type,two different cores for the privte purchased ones(one of them the awarded type),pinbacks,screwbacks,double screws....rule braking pieces like a "CD935" with 2nd core type,convex......2nd classes with 2nd core type........a long list to get them all complete
Micha