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Additional Pictures 

 

The Radio Shack EC-430 Checkbook Calculator in its sleeve with holder for a checkbook and pen.

This Radio Shack EC-430 Checkbook Calculator was manufactured in August 1992 in Thailand (Date code 8A2 mth 08 yr 1992).

The printed circuit board (PCB) of the EC-430 manufactured in 1992 doesn't reveal type and manufacturer of its
single-chip calculator circuit but we are almost positive to spot a Toshiba T7752S.

Close-up view of the Toshiba T7752S single-chip calculator circuit.

Close-up view of the PCB-Mark of a EC-430.


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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, February 26, 2020. No reprints without written permission.