SG41 (Schlusselgerat 41)

[Maleme]

Came across this in The Times Obituary Column 10/9/2010. It recorded the death of Keith Batey (1919-2010) a Bletchley Park Codebreaker and it mentions the German SG41 cipher machine which I have never heard of. In the article it says:
"When the Abwehr introduced a completely different cipher machine, the SG41 (Schlusselgerat 41), in December 1944, it was Batey who was assigned to try to break it. Although he managed to read a few messages neither he nor his American counterparts ever managed to reconstruct the workings of the machine, which the Americans subsequently declared unbreakable. As it names suggests it was invented in 1941. If it had been introduced even a year earlier, and more widely across the Wehrmacht, it would have caused big problems for the Allied invasion of Europe.."

There is some more info on this machine here:

http://www.jproc.ca/crypto/schluesselgeraet_41.html

Best wishes, Paul.