DATAMATH CALCULATOR MUSEUM
Longines Symphonette Electronic Calculator (TI-2500B)
|Date of introduction:||Display technology:||LED-stick|
|New price:||Display size:||8|
|Size:|| 5.5" x 3.0" x 1.7"
139 x 76 x 42 mm3
|Weight:||6.7 ounces, 191 grams||Serial No:||2500B313624|
|Batteries:||3*AA NiCd or 4*AA Alkaline||Date of manufacture:||1973|
|AC-Adapter:||AC9130 or AC9120||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Joerg Woerner|
This calculator sold by Longines Symphonette could be easily recognized as a Texas Instruments Datamath calculator.
The main differences between the original and the badged calculators are the
olive-green colour of the housing, the grey keys and the Longines Symphonette
A more detailled comparison between the seven known Datamath Versions could be found here. Currently three of them are reported to be sold under the Longines Symphonette label:
TI-2500 Version 1
• TI-2500 Version 2
Datamath™ is a trademark of Texas Instruments.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.