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"    
Weight:  10 ounces Serial No:  2500B313624
Batteries:  3*AA NiCd  Date of manufacture:  1973
AC-Adapter:  AC9130 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0119
Memories:      
Program steps:   Courtesy of:  Joerg Woerner

This calculator sold by Longines Symphonette could be easily recognized as a Texas Instruments Datamath calculator. 

Compare-Back.jpg (51688 Byte)Compare-Front.jpg (52869 Byte)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 label. 

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
TI-2500B

Datamath™ is a trademark of Texas Instruments.



If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, December 5, 2001. No reprints without written permission.