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Additional Pictures
The sales box of the Radofin Model 2200 calculator sold
around 1974 in the US. |
This Radofin Model 2200 was manufactured
in May 1974 in Hong Kong. |
The Radofin Model 2200 is
powered by a disposable 9-Volt battery. |
The
Rafofin Mopdel 2200 calculator with its housing opened. |
| The printed circuit
board
(PCB) of the Radofin Model 2200 is centered around a General Instrument CZL-550 single-chip calculator circuit.  |
The frontside of the PCB
of the Radofin Model 2200 calculator. |
Close-up view of the
General Instrument CZL-550 single-chip calculator circuit. |
Close-up view of the
ITT 7105 Digit Driver. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, August 3, 2025. No reprints without written permission.