Toshiba BC-1205B

Date of introduction:  1973 Display technology:  LED
New price:   Display size:  12
Size:  6.9" x 4.0" x 1.6"
 175 x 102 x 40 mm3
Weight:  14.5 ounces, 440 grams Serial No:  G51910
Batteries:  5*AA or NiCd-pack Date of manufacture:  year 1973
AC-Adapter:  BH-101, BH-102 or
 BH-103 (220V)
Origin of manufacture:  Japan 
Precision:  12 Integrated circuits:  Toshiba T3125, T3130
Program steps:   Courtesy of:  Piero Todorovich

BC-1205B_PCB.jpg (77680 Byte)This Toshiba BC-1205B - introduced in 1973 - was far ahead the competition. Instead the usual display with 8 digits or 10 digits resolution found in the LE-80 resp. Canon LE-10 this one sports a 12-digit display assembled with red LED's (Light-Emitting Diodes).

The BC-1205B makes use of a chip set consisting of the Toshiba T3125 and T3130 never found in any other calculator.

BC-1205B_KBD.jpg (92539 Byte)Even the keyboard assembly looks unusual for such a small calculator. It uses a very reliable construction with small magnets and Reed-contacts known from early desktop calculators.

The Toshiba BC-0804B uses an almost identical housing but sports a green Vacuum
Fluorescent Display.


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Joerg Woerner, December 11, 2002. No reprints without written permission.