Date of introduction:   Display technology:  LCD (yellow)
New price:   Display size:  8
Size:  5.3" x 2.6" x 0.4"    
Weight:  3.2 ounces Serial No:  625814
Batteries:  2*LR44  Date of manufacture:  
AC-Adapter:   Origin of manufacture:  GDR
Precision:  8 Integrated circuits:  U827G
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

You are familiar with this MR413 produced by the former GDR based company RFT ? You are right, this is a perfect copy of the early Texas Instruments Datachron aka TI-1790.

Compare the perfection of the copy of the internals with the attached pictures. You'll find the MR413 always on the left side of the pictures.

MR413B.jpg (88353 Byte)

The earlier MR411 from RFT uses the original Toshiba calculator chip, the MR413 uses a copy of it. MR413IC.jpg (90907 Byte)

If you have additions to the above article please email:

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