Model: Montgomery Ward P300 (TXI-8663A)
Battery: 3*AA NiCd or 4*AA Alkaline
Adapter: AC9130
Year: 1974
Chip: TMS0120, 2*SN75493, 2*SN27423
Manual:
Info: This Montgomery Ward P300 aka TXI-8663A could easily identified as larger brother of the P200 aka TXI-8662A and a close relative of the SR-10.