Texas Instruments

• Slanted LCD

Model: BA-54
Battery: 2 x LR44
Adapter: 
Year: 1997
Chip:  CD4553 CD4554 
Info:  slanted LCD  generation

• Slanted LCD

Model: BA-55
Battery: 2 x LR44
Adapter: 
Year: 1983
Chip:  CD4553 CD4554 
Info:  slanted LCD  generation

• LCD-1982-1987

Model: BA-II
Battery: 2 x LR44
Adapter: 
Year: 1985
Chip:  TPO322
Info:  Business Analyst II

• LCD-1991-1999

Model: BA II plus
Battery: CR2032
Adapter: 
Year: 1996
Chip:  T6a53 Toshiba
Info: modern LCD  1991 - 1999

• LCD-1982-1987

Model: BA-III
Battery: 2 x LR44
Adapter: 
Year: 1985
Chip:  TPO322
Info: