DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Aristo M 27 (Version 3)
| Date of introduction: | April 1973 | Display technology: | LED |
| New price: | Display size: | 8 | |
| Size: | 3.5" x
2.4" x
1.1" 88 x 60 x 27 mm3 |
||
| Weight: | 3.0 ounces, 84 grams | Serial No: | |
| Batteries: | 5*AA | Date of manufacture: | mth 04 year 1973 |
| AC-Adapter: | Origin of manufacture: | Germany | |
| Precision: | 8 | Integrated circuits: | TMS0105 |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(DE: 2.4M Bytes) |
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Version 1: Rectangular design, no CE key
Hamburg
(Germany) located company Dennert & Pape started already in the year 1872
the business with slide rules. About 100 years later they introduced under the
trademark ARISTO with the model M 27 their first electronic pocket calculator.
As of today we know three different versions of the M 27 calculator, they
can easily be differentiated by the shape and number of keys:
• Version 2: Rectangular design, red CE key
• Version 3: Rounded design, red CE key
The M 27 based on the „calculator-on-a-chip"
manufactured by Texas Instruments and found in a lot of other calculators like
the Bowmar 901B and even the TI-2500
Datamath. Compared to these products the M 27 is unexpected small and shows
an unique design based on a housing with a white bottom, a matte black top and
keys in bright yellow and red color.
The next calculator in the ARISTO line is
the M 36 sporting an additional memory key. The M 36 could be called the most
beautiful calculator and ARISTO kept this design for the next some twenty
calculators.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, May 3, 2002. No reprints without written permission.