The Edison cube is it's own brand. It has a very distinct feel to it, and you are quite lucky to have one. They are expensive, hard to find, and really great cubes. The only problem I find with them is the core. I have a lot of problems with mine unscrewing. Anyway, the "Type" cubes are each different cubes. Type A1 is it's own cube, type D is a whole other cube, etc...