Longines Symphonette Electronic Calculator Version 2

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:  12 ounces Serial No:  D1000-42285
Batteries:  4*AA NiCd (internal) Date of manufacture:  1973
AC-Adapter:  AC9130 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0119
Program steps:   Courtesy of:  Peter Muckermann († April 21, 2021)

This calculator sold by Longines Symphonette could be easily recognized as a Texas Instruments Datamath calculator. The only difference between the original and the badged calculators is the Longines Symphonette label. 

A more detailed 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.

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© Joerg Woerner, September 19, 2002. No reprints without written permission.