DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1982||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 2.8" x
6.0" x 0.3"
70 x 152 x 7 mm3
|Weight:||2.4 ounces, 69 grams||Serial No:||42907|
|Batteries:||CR2025||Date of manufacture:||year 1982|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||NEC uPD1833G|
|Program steps:||Courtesy of:||Joerg Woerner|
Canon Checkbook started the idea of an Account Manager already in
1982 and outdated the Texas Instruments TI-2200
by a few weeks. A
less powerful version with only one memory was sold as Checkbook
Junior and the CB-8 Checkbook added a red mystery [A↔F] key.
Canon fitted the Checkbook calculator with a brown sleeve holding a golden pen and space for a maximum of five credit/debit cards.
Dismantling this Checkbook calculator manufactured in 1982 in Japan reveals a very solid construction centered around a NEC uPD1833G single-chip calculator circuit.
In the meantime we found a lot of similar products like the National Semiconductor NS-103 A, the Olivetti Chequebook, the Radio Shack EC-430or the Texas Instruments TI-2200 II Checkwriter - all sporting the NEC uPD1833G chip located in this Canon Checkbook calculator.
The beautiful Checkbook II and the long lasting Checkbook III replaced the original Checkbook some years later.
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.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 15, 2001. No reprints without written permission.