Casio CB-100 Checkbook

Date of introduction:  1983 Display technology:  LCD
New price:   Display size:  8
Size:  2.8" x 6.2" x 0.3"
 70 x 157 x 7 mm3
Weight:  2.4 ounces, 67 grams Serial No:  
Batteries:  CR2025 Date of manufacture:  year 1985
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8  Integrated circuits:  NEC uPD1826G-009
Memories:  5+1    
Program steps:   Courtesy of:  Joerg Woerner

The Canon Checkbook started the idea of an Account Manager already in 1982 and outdated the Texas Instruments TI-2200 by a few weeks. Casio entered the market of Checkbook calculators in 1983 with the CB-100 and increased the numbers of memories from three to five. A less powerful version with only two memories was sold as CB-80.

Casio fitted the CB-100 Checkbook calculator with a brown sleeve holding a golden pen and space for a maximum of five credit/debit cards.

The CB-100 Checkbook calculator is powered by a single 3V Lithium battery.

Dismantling this CB-100 Checkbook calculator manufactured in 1985 in Japan reveals an interesting construction centered around a NEC uPD1826G single-chip calculator circuit with Mask-ROM Version -009.

Learn more about single-chip calculator circuits used in Account Manager Calculators.

Don't miss the Corvus CheckMaster introduced by Mostek already in 1975. This rare product retains the balance of your memory even when shut off but uses power-hungry electronics.

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If you have additions to the above article please email:

Joerg Woerner, November 30, 2019. No reprints without written permission.