Those are all promotional/business card chips that get distributed at shows and have little value! A sample chip would have an obverse and reverse design and be notched. They would be presented to customer for approval or change requests. These should not be confused as prototypes which were usually made on spec. I hope this puts this to rest. That is not to say they are not collectable. Some people collect sugar packs and soap. Collect what you like just know what it is you are collecting.