Grey marbled Platignum propelling pencil Designer (Person) Unknown Manufacturer Platignum Date 1920 - 1929 (circa)
Imperial 220 Designer (Person) Unknown Manufacturer Litton Industries Manufactured for Imperial Date 1972 (circa)
Summa Prima 20 adding machine Designer (Person) Nizzoli, Marcello Manufacturer Olivetti Date 1960 - 1969 (circa)