DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1974||Display technology:||LED Optostick|
|New price:||$69||Display size:||9|
|Size:||6.0" x 3.1" x 1.3"|
|Weight:||9 ounces||Serial No:||221391|
|Batteries:||3*AA||Date of manufacture:||year 1974|
|AC-Adapter:||Origin of manufacture:||USA|
|Precision:||8||Integrated circuits:||WD LC1552|
|Program steps:||Courtesy of:||Joerg Woerner|
The Bowmar MX-55 was introduced more than two years after the famous Bowmar 901B. A lot of things happened in the meantime. The relationship between the competitors Bowmar, Ali and Texas Instruments wasn't the best (read more here) and you may notice it:
|• The keyboard looks like a
keyboard manufactured by TI but was another design.
• The calculator chip inside was from the indepenent supplier Western Digital.
• Actually a LC1552B was used here, a chip supporting a 4-key memory. And this in a calculator without any memory!
Compare it with the Montgomery
Ward P8M or the Radio Shack EC-300
using an identical chip. New York based company Melcor made similar experiences,
don't miss the Melcor Model 380.
Don't miss the similar looking but yet completely different Sears Digi·matic 8.
Bowmar Instruments was one of the first casualties of the Calculator Wars and filed in 1976 for bankruptcy. Don't miss a mystery calculator with the Bowmar brand introduced in 1977!
Klixon™ is a trademark
of Texas Instruments.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.