Electronic Pocket Calculator by Casio, c 1985
1980-1990
Electronic Pocket Calculator with integral semi-rigid PVC wallet, by Casio, c 1988
1986-1992
Electronic Pocket Calculator by Casio, c 1987
1986-1988
Electronic Pocket Calculator with semi-rigid PVC case, by Casio, 1984
1984
Electronic Pocket Calculator with plastic case, by Casio, c 1980
1980-1984