Texas Instruments TI-2511 (Made in Spain - 1st design)

Date of introduction:  1974 Display technology:  LED-stick
New price:  2,390 pts (Oct. 1974) 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:  ME 1855
Batteries:  4*AA Alkaline  Date of manufacture:  wk 39 year 1974
AC-Adapter:  AC9900/E Origin of manufacture:  Spain
Precision:   Integrated circuits:  TMS0119
Program steps:   Courtesy of:  Joerg Woerner

TI-2511_CMP.jpg (24829 Byte)The Datamath TI-2511 was manufactured solely in Spain and uses an identical construction to the TI-2510 featuring its unique beige housing. 

TI-2511-Batt.jpg (25523 Byte)Both the TI-2510 and TI-2511 use 4 AA-size alkaline batteries, the use of rechargeable batteries found in the sibling TI-2500B is not possible.

How rare is the TI-2511?
This one is serial number 1855, the proud owner Javier Moreno Siguenza, living in Spain, reported his TI-2511:
Date of manufacture: wk 42 year 1974
Serial number: 8818

We located recently a TI-2511 with the serial number AE 01671 and manufactured in December 1974.

A more detailed comparison between the seven known Datamath Versions could be found here.

The last evolution step of the Datamath calculator was the odd TI-2500-II introduced more than two years after the original type.

Datamath™ is a trademark of Texas Instruments.

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© Joerg Woerner, December 7, 2002. No reprints without written permission.