Rockwell 24HF calculator Designer (Person) Unknown Manufacturer Rockwell International Manufactured for House of Fraser Date 1970 - 1979 (circa)
Sinclair Oxford 200 calculator Designer (Person) Unknown Manufacturer Sinclair Date 1980 - 1989 (circa)
Letter Opener SS-20 calculator Designer (Person) Unknown Manufacturer Unknown Date 1980 - 1989 (circa)
Casio Electronic Printing Calculator HR-100 Designer (Person) Unknown Manufacturer Casio Date 1980 - 1989 (circa)
Rockwell Model 18R calculator Designer (Person) Unknown Manufacturer Rockwell International Date 1976