translator1Model: TI-2500 datamath
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972
Chip: TMS0119
Info: 1 version






translator1Model: TI-2510
Battery: 4 x AA ni-cd internal
Adapter: AC9120
Year: 1975
Chip: TMS0119
Info:





translator1Model: TI-2500 datamath
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972
Chip: TMS0119
Info: 2 version







translator1Model: TI-150
Battery: 4 x AA ni-cd internal
Adapter: AC9150
Year: 1975
Chip: TMS0852
Info: This calculator tastes different, it was a dear friend Joerg of datamath.org who gave it to me. Very Rare





translator1Model: TI-2500 II datamath
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972
Chip: TMS083
Info:






translator1Model: TI-2550
Battery: 4 x AA 
Adapter: 
Year: 1974
Chip: TMS0601
Info:





translator1Model: TI-2500 B datamath
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972
Chip: TMS083
Info:





translator1Model: TI-2550 II
Battery: 2 AA or BP2
Adapter: 
Year: 1976
Chip: TMS1071
Info:





translator1Model: TI-2500 longines 
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972
Chip: TMS083
Info:





translator1Model: TI-2550 III
Battery: BP3
Adapter: AC9130A
Year: 1976
Chip: TMS1043
Info: