*1) The Rheinmetall machines have a remarkable weight saving technology. Stead of having each digit serving its own stepped drum. Their stepped drums, located in the middle under two digits / keyboard strips, serving those two simultaneously.

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Content without guarantee! (UK); Inhalt Ohne Gewähr! (DL)
Type name / number: Id (7x6x12) (Operating by hand and no automatic division, no "D" as leading character)
Production / SN: 16570
Calculating principle: Stepped-drum or Leibniz Wheel (UK) ; Staffelwalze (DL) *1)
Calculating functions: Add, Subtract, Multiply, Divide
Input accuracy 7 digits, Full keyboard and 6 digits on carriage (revolution counter)
Calculating accuracy: 12 digits
Extra's: Brass(!!) stepped drums and other parts. In later models, only steel drums are mounted. The logo is also on a brass plate.
The key board units have no zero setting (relatively seldom).
Designer:  
Production year: +/- 1922 -1930
Case material: metal plates ; the frame is aluminum
Weight: 9,2 Kg
External links:  
Previous owner: --
Cosmetic imperfections:
(I accuse no one):		 Previous owner(s)? have repaired a broken frame leg and side part. Internally the frame was at arrival also broken on three locations. The repaired leg was broken again.
One white "five"- and two "one" key tops are not original. The two red key tops right are missing. The front crank has one not original leg.
Date of receiving: 2010-dec (e-bay),
Machine story: 2011-jan-06: The machine was perfectly packed, on arrival, for absorbing side and top shocks. The bottom was not. So the leg, which was repaired before, was broken again. I belief that that might be the course of the other broken parts of the frame as well. I cleaned the internals after dismantled the key strips etc. I repaired the leg with new screws and the frame with two-component metal glue. Not fully to my satisfaction, but for the time being OK.
I have a spare frame, but to dismantle the hart of the machine and building it on the spare frame, is not an easy task. I am surging for procedures / manuals to guide me through this.
2011-febr. From other machines the front crank is replaced by an complete one and the missing key tops are mounted. The C key is not functioning. It blocks the machine. Need some study.