Model: BA-54Battery: 2 x LR44Adapter: Year: 1997Chip: CD4553 CD4554 Info: slanted LCD generation
Model: BA-55Battery: 2 x LR44Adapter: Year: 1983Chip: CD4553 CD4554 Info: slanted LCD generation
Model: BA-IIBattery: 2 x LR44Adapter: Year: 1985Chip: TPO322Info: Business Analyst II
Model: BA II plusBattery: CR2032Adapter: Year: 1996Chip: T6a53 ToshibaInfo: modern LCD 1991 - 1999
Model: BA-IIIBattery: 2 x LR44Adapter: Year: 1985Chip: TPO322Info:
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