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The calculator has a battery as well as a solar cell. The solar cell alone is not powerful enough to power the calculator when there is no battery inserted. It is soldered in parallel with the battery which is a bit odd because the SR1120SW is not rechargeable. It may help a tiny little bit with the longevity of the battery?
At the back there are instructions on how to (re)set the exchange rate so this converter can be adapted to any currency.
Graciously donated to the museum by Iker Barreiro Martinez. Thanks, Iker!
In January of the year 2002 twelve European countries switched from their native currency to a new European currency, the Euro. And what the people in those countries needed of course were Euro calculators. The more conversion options the better. Many promotional Euro calculators were made by banks. All these calculators of course became obsolete after a year or two. Now they’re but nice relics of this daring currency change in Europe.
For more information on the Euro switch, read one of the many articles that can be found on the internet. More on the Euro can be found in this Wikipedia article (link valid 2024-01-13).