DATAMATH PICTURES

The sales box of the Radio Shack 65-504 Checkbook Calculator sold around 2000 in the US.
The Radio Shack 65-504 Checkbook Calculator in its sleeve with holder for a checkbook and pen.
This Radio Shack 65-504 Checkbook Calculator was manufactured in October 2000 in China (Date code 10A00 » mth 10 yr 2000).
The Radio Shack 65-504 Checkbook Calculator is powered by two LR43 batteries.
The printed circuit board (PCB) of the Radio Shack 65-504 Checkbook Calculator is centered around an unknown single-chip calculator circuit hiding under a small epoxy blob.
Close-up view of the unknown single-chip calculator circuit.	Close-up view of the PCB-Mark of a 65-504.