Texas Instruments

datamath

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

datamath

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

datamath

Model: TI-2500 Longines Symphonette Battery: 6 x AA ni-cd internal Adapter: AC9100 Year: 1972Chip: TMS0119 Info: This calculator sold by Longines Symphonette could be easily recognized as a Texas Instruments Datamath calculator. It followed the Electronic Calculator introduced few month earlier. The main differences between the original and the badged calculators are the olive-green colour of the housing, the grey keys and the Longines Symphonette label.

Model: TI-2500 Longines Symphonette 1 version Battery: 6 x AA ni-cd internal Adapter: AC9100 Year: 1972Chip: TMS0119 Info: This calculator sold by Longines Symphonette could be easily recognized as a Texas Instruments Datamath calculator. It followed the Electronic Calculator ioduced few month earlier. The main differences between the original and the badged calculators are the olive-green color of the housing, the grey keys and the Longines Symphonette la.