TI 30 solar plusModel: TI-30 D
Battery: 2 x AA
Year: 1982
Chip:  TP0456 (CD4565)
Info:  I must thank the family of Massimo Di Pietro, former Texas Instruments employee of the Cittaducale (Rieti) office, in particular his daughter Francesca and her husband Antonio who donated many databooks, calculators and personal paper material of their father Massimo to our ODV. A thousand thanks