DATAMATH  CALCULATOR  MUSEUM

Tohotronic Roger Fighter F-4 (Version 1)

Date of introduction:  1975 Display technology:  Fluorescent
New price:   Display size:  8 + Sign
Size:  5.4" x 3.1" x 1.0"
 136 x 78 x 25 mm3		    
Weight:  4.2 ounces, 120 grams Serial No:  4 3444173
Batteries:  2*AA Date of manufacture:  mth 09 year 1975
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  NEC µPD277
Logic:  Chain Displays:  NEC LD8122
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Toho Tsusho Co., Ltd. manufactured in the 1970s electronic calculators very distinctive electronic calculators that were not only sold under their own Tohotronic brand but distributed with labels from companies like BMC, Decimo, Federal, Hugin, MBO, Prinztronic, Tecnosonic and Texet. MBO International Electronic GmbH was one of Toho's largest Original Equipment Manufacturer (OEM) customers and sold this Tohotronic Roger Fighter F-4 as MBO de Luxe III calculator. As of today to we know a total of five different versions of Roger Fighter and MBO de Luxe pairings:

• Roger F-1 - de Luxe I
• Roger F-3 - de Luxe II
• Roger F-4 - de Luxe III
• Roger F-5 - de Luxe IV
• Roger F-6 - de Luxe V

The featured Tohotronic Roger Fighter F-4 (Version 1) calculator was manufactured in September 1975 in Japan and is identical with the MBO de Luxe III (Version 1). Don't miss the full "Teardown Treatment" of its twin.



horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, April 5, 2025. No reprints without written permission.