Summa Prima 20 adding machine Designer (Person) Nizzoli, Marcello Manufacturer Olivetti Date 1960 - 1969 (circa)
Deluxe pencil sharpener Designer (Person) Unknown Manufacturer Unknown Manufactured for Entre Date 1997 (circa)
Addiator mechanical calculator Designer (Person) Unknown Manufacturer Kingson Date 1960 - 1979 (circa)