Hewlett-Packard HP 80 hand held electronic business calculator c1972
1972-1974
Casio electronic calculator
Casio electronic calculator, 1977
1977
'Little Professor' electronic calculator, 1980
1980
Electronic Pocket Calculator TI 30
1976
Franc to Euro converter
1997
Plastic case for the Sinclair Cambridge memory electronic calculator
1974
Casio electronic calculator, 1976
1976
Casio electronic calculator
Casio electronic calculator
Electronic calculator with case, by Casio, 1984
1984
Cambridge memory electronic calculator
1974
Sharp Elsimate EL-8151 electronic calculator with AC adaptor
circa 1980
Sinclair Cambridge Memory electronic calculator
1974
Friden 1150 electronic printing calculator
circa 1970
Electronic Calculator by Hewlett-Packard
1974