Type name / number: Walther SRM13
Production / SN: 62397
Calculating principle: Rocking Segment
Calculating functions: Add, Subtract, automatic Multiply
Input accuracy 11 digits
Calculating accuracy: 13 digits
Extra's: Multiply function (one key and one slider??), R key: Back assignment of results. Two displays one with pos neg indicator.
Fast circle shape printing head.
Motor cooling by fan both typical for this series (see others types).
Label plate of the first owner company BBC with production date.
Designer: ?
Production year: 1958
Case material: Aluminum case and bottom plate.
Weight: 9,7 Kg
External links: http://www.rechenkasten.de/Walther/Company/ http://www.rechnerlexikon.de/upload/5/51/Aufsatz-Walther-Geh%E4useformen-2011-03.pdf

Previous owner: Mr. H.  Haake , Dortmund, Germany
Cosmetic imperfections:
(I accuse no one)		 Some surface scratches on the paint. Two key tops are broken. Machine name plate missing.
Date of receiving: 2012 - june 24, eBay ; Machine picked up at home of the very sympathetic seller and his wife. Nice conversation and got a bonus machine!
Machine story:

2012-07-30
First calculating check not ok Calculating seems ok but printing was holding back. After a wile the motor starts to turn slowly, which might caused by the radio interference network filter, housed in a aluninum cylinder above the motor. First this one removed. Problem disapease!
Machine sprayed with W40 to loosen the printing mechanism.
2012-07-31
The machine internally heavily cleaned. Broken key tops replaced with ones from a spare machine. Re oiled on the most needed lacations. Printing mechanism is working perfect now. Ink ribbon turned to past dry part. Feed sockets glued again. Will make a new network filter in the same housing for spark prevention only. (Need to buy a few resisters first.) Manufacturer name plate from a spare machine placed . Machine assembled and was calculating as aspect. Multiplying needs some extra study !

Content without guarantee! (UK); Inhalt Ohne Gewähr! (DL)