Texas Instruments SR-10 (Italy - Version 1)

Date of introduction:  1973 Display technology:  LED modules + lens
New price:   Display size:  8 + 2
Size:  6.3" x 3.1" x 1.5"
 158 x 78 x 38 mm3
Weight:  9.2 ounces, 262 grams Serial No:  008024
Batteries:  3*AA NiCd Date of manufacture:  wk 29 year 1973
AC-Adapter:  AC9900 Origin of manufacture:  Italy
Precision:  8 Integrated circuits:  TMS0120, 2*SN27422, 2*SN27423
Logic:  Chain Displays:  DIS115 (12*DISXXX)
Program steps:   Courtesy of:  Joerg Woerner
    Download manuals:    (US: 4.0M Bytes)
  (US: 3.2M Bytes)
  (US: 2.6M Bytes)

This early SR-10 manufactured in Italy is a hybrid with the electronics of the SR-10 USA V2 and the housing of the SR-10 USA V1 making it an SR-10 Version 1 - Display 2:

Version Position of
SR-10 logo
SR-10 USA V1 Display frame 6-digit modules
 without lens
4 ICs
SR-10 USA V1D2 Display frame single modules
with lens
4 ICs
SR-10 Italy Display frame single modules
with lens
4 ICs
SR-10 USA V2 Keyboard single modules
with lens
4 ICs
SR-10 USA V3 Keyboard single modules
with lens
2 ICs

Here at the Datamath Calculator Museum we classify the featured SR-10 as Display Frame Version 1, PCB Type 2 and Display Type 2.

SR-10-V1I_1.jpg (23173 Byte)Please notice the slightly different embossing of the SR-10 logo found on this calculator compared with its twin SR-10 manufactured only a few weeks later.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, October 23, 2003. No reprints without written permission.