MBO Junior

Date of introduction:  1973 Display technology:  LED-modules
New price:   Display size:  8
Size:  5.1" x 3.0" x 1.3"    
Weight:  5 ounces Serial No:  16281
Batteries:  5*AA Date of manufacture:  mth 03 year 1973
AC-Adapter:   Origin of manufacture:  Germany
Precision:  8 Integrated circuits:  TMS0105
Program steps:   Courtesy of:  Peter Muckermann († April 21, 2021)

This MBO Junior manufactured in Germany is based on the KIT-calculator Mini 73 sold by Ellenberger Electronic AG.

MBO International Electronic GmbH, Jena was founded 1973 and could be called the first company producing calculators in Germany. Already in 1976 MBO started to place their brand on Far-East OEM calculators, within the Datamath Calculator Museum you'll locate some Toshiba based designs:

Year MBO designation Toshiba designation
1976 Conti 10 Homeland t.b.d.
1976 Conti 20 Homeland t.b.d.
1978 LC 2014 WA LC-834WA
1978 ALPHA 502 SLC-8261

According to fellow collector Frank Boehm this calculator was manufactured by DITTEL.

If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.