DATAMATH PICTURES

This Caltronic 812 was manufactured in December 1972 in Hong Kong.

The Caltronic 812 is powered by a disposable 9V battery.

The Caltronic 812 calculator with the rearside of its housing removed.

The Caltronic 812 calculator with its housing completely removed.

The Main printed circuit board (PCB) of the Caltronic 812 is centered
around a Cal-Tex CT5002 single-chip calculator circuit.

Close-up view of the Cal-Tex CT5002 single-chip calculator circuit.

Close-up view of one of the SN75492 display drivers .

Close-up view of the RCA CA3081 transistor array.

Close-up view of the 3 Litronix DL-33 Seven-Segment LED Displays.