SL55 automatic de luxe cassette recorder Designer (Person) Unknown Manufacturer ITT Date 1969 - 1973 (circa)
Addiator mechanical calculator Designer (Person) Unknown Manufacturer Kingson Date 1960 - 1979 (circa)
Petrous PRMC-1 calculator Designer (Person) Unknown Manufacturer Petrous Electronic Corp Date 1970 - 1999 (circa)