Grey Platignum Quick Change founatin pen Designer (Person) Unknown Manufacturer Platignum Date 1930 - 1939 (circa)
Green Platignum Quick Change founatin pen Designer (Person) Unknown Manufacturer Platignum Date 1930 - 1939 (circa)
Prinztronic X15 calculator Designer (Person) Unknown Manufacturer Prinztronic Date 1970 - 1979 (circa)