Western Auto
Model: Citation (66-4986-7)
Battery: 9 volt
Adapter:
Year: 1978
Chip: TMC0921
Info: If you remove the key-plate known from e.g. the "electronic Wizard" from this Citation you'll get a TI-1050. Everything else is identical, even the back of the calculators tells you the manufacturer Texas Instruments.
Model: Citation (66-4987-5) TI-1025
Battery: 9 volt
Adapter: AC9180
Year: 1977
Chip: TMC0923
Info: With the discontinuation of the TI-1200 family in 1977, Western Auto consequently replaced the M4987 "Citation" calculators and its siblings M4986 and M4988 with products based on the TI-1000 family. While the backside of the revised "Citation" calculator is missing any reference to the previous M4987 designation, sports the sales box a part number 66-4987-5, obviously a reference to the original naming scheme.
Model: Citation (66-4988-3)
Battery: 9 volt
Adapter:
Year: 1978
Chip: TMC0921
Info: If you remove the key-plate known from e.g. the "electronic Wizard" from this Citation you'll get a TI-1050. Everything else is identical, even the back of the calculators tells you the manufacturer Texas Instruments.
Model: Citation ( M4986 )
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0952
Info: This calculator is identical to the TI-1200 sold under different names from the Western Auto company. The most common names are "Citation" or "M4986". The only difference from the TI-1200 is the wooden template and the missing TI logo.
Model: Electronic Wizard ( M4987 )
Battery: 9 volt
Adapter: AC9180
Year: 1975
Chip: TMS0952
Info: This calculator is identical to the TI-1250 sold under different names from the Western Auto company. The most common names are "Electronic Wizard" or "M4987", but later also obtained the confusing "Citation" plate. The only difference from the TI-1250 is the wooden template and the missing TI logo.
