Type name / number: | 8100 Sundstrand's Underwood Adding machine (hand driven) |
Production / SN: | 321050 |
Calculating principle: | Rocking Segment |
Calculating functions: | Add, Subtract with nine complements |
Input accuracy | 8 digits |
Calculating accuracy: | 8 digits |
Extra's: | The sides of the case and the bottom plate are painted with a structure-paint |
Designer: | The Sundstrand brothers |
Production year: | 1940 |
Case material: | Aliuminium |
Weight: | 13,7 Kg |
External links: | |
Previous owner: | M. Gutwein, Oberursel, Germany |
Cosmetic imperfections: (I accuse no one): |
Whole machine is extra ordinary well kept!!! |
Date of receiving: | 2012-08-25 During our summer holiday trip back home picked up |
Machine story: | 2012-08-27 Calculating test is showing a perfect working machine! even the ink ribbon is not dried-out. Due to strange / unknown case mounting, I have not see the inside mechanics. |
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