DATAMATH CALCULATOR MUSEUM
Texas Instruments SR-40 Prototype
|Date of introduction:||Never||Display technology:||LED-stick|
|New price:||Display size:||10 + 2|
|Size:|| 5.8" x 3.2" x
147 x 81 x 32 mm3
|Weight:||8.1 ounces, 231 grams||Serial No:||0000030|
|Batteries:||BP1A||Date of manufacture:||wk 24 year 1975|
|AC-Adapter:||AC9130||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Marie Collas|
We knew already the SR-40 Prototype with the impressive serial number 001P when fellow collector Marie Collas reported in 2012 the discovery of a second SR-40 Prototype in Mexico. He spent not only a fortune to acquire this rare calculator but arranged shipment directly to the Datamath Calculator Museum. Thanks!
What a surprise to discover with 0000030 a "real" serial number
on the back of the calculator.
Dismantling this SR-40 Prototype manufactured in Summer 1975 reveals an identical design to the SR-40 Prototype 001P but the TMS1111 single-chip calculator circuits lacks the socket.
Interested in rare calculators with the "40" designation? Don't miss this model 40.
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© Joerg Woerner, March 7, 2013. No reprints without written permission.