Triumph-Adler 81S, EC 24/24A

Serial number EC24: 68.518.773
Accessories Accu pack charger, AC 220V, Type LG1

Built-in NiCd accu pack, Varta 4/90 DKO, still working
Condition Very good. Scratches on the back of the unit. Some key contact problems, especially "C" and square root.
Repairs, Comments
Acquired 25.1.2004

Serial number EC24: 68.528.045
Accessories Pouch

"Bedienungsanleitung" (German, English, Italian, Spanish, printed in Japan, 40 pages, undated)
Condition Absolutely excellent front. Some scratches on the back.
Repairs, Comments
Acquired 18.7.2008
Serial number EC24A: 66.042.206
Accessories Pouch
Condition Excellent. However, the on-switch has a serious contact problem.
Some corrosion on the battery contacts
Repairs, Comments Disassembled the unit and fixed the on-switch contact problem. 
This works now but the unit does not work with batteries - maybe a problem of the corroded contacts.
Acquired 24.11.2002
Type, Precision, Input mode Simple, 8 BCD digits, no exponent, Algebraic
Programmable No
Memory 1 memory, not permanent
Display 9 digit 7 segment red or green LED, one digit for sign/error display
Special features The EC24A has no problems to calculate the root of a negative number! The result is negative again.
Original Pricing, Production 1975, approx. 65 Euro, TA-Vertriebs GmbH, 8500 Nürnberg
Batteries 4xAAA or DC 6V off-the-shelf power supply. On the EC24 with the red display the power supply connector is located on the top edge, on the EC24A on the bottom edge. The EC24 with the green display does not have a connector for external power.
Dimensions Length 13cm, Width 7.5cm, Height 2.1cm
Comment Was also sold as the "Alaska" calculator.
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