BBC button mould Designer (Person) Unknown Manufacturer Unknown Manufactured for James Grove & Sons Date 1970 - 1979 (circa)
Royal Arsenal Co-op tokens Designer (Person) Unknown Manufacturer Unknown Manufactured for Co-op Date 1970 - 1979 (circa)
Imperial Royal digital 5-T calculator Designer (Person) Unknown Manufacturer Unknown Manufactured for Imperial Computer Company Date 1970 - 1975 (circa)