[GreenKeys] Here's a sweet one on the bay. (crypto machines)

[Craig Sawyers]

> To make the discussion on the Greenkeys list of the SIGABA machine go full
> circle, it is noteworthy that SIGABA, SIGCUM, the KL-7 and the
> KL-47 were all manufactured by Teletype Corporation.  

Teletype also supplied selector mechanisms that were fitted to the SZ42.  In
fact all the many screws in the machine are US threads other than four M3
metric ones that secure the mains transformer, which was wound using UK wire
gauges!

Craig