[GreenKeys] Model 15 sort of

[George B. Hutchison]

Larry and GreenKeyers - - -

>From what little you have described I am wondering if that model 15 
you have might not be a Lorenz Model 15. RCA Communications did use a 
number of the Lorenz machines.

In the 1930's (check me on this please, My Haynes), Teletype licensed 
Lorenz to make a lot of their stuff exactly the same as Teletype.  If 
you look at some of the range-finders you can see on some of the 
Lorenz-made German Cryptographic equipment you will see that they are 
exact copies. I cannot say whether or not the screw-threading was the 
same as American SAE, but I would bet they were.

Also, the  mention of the "strange green" color is also an indication 
of possible Lorenz background.

The German keyboards had four rows of keys, as opposed to three rows 
on Teletype Corp stuff. The top row was numbers.

Check the vanes on the typing unit you acquired. Teletype corp vanes 
were all solid. The Lorenz vanes had slots punched or milled in them 
to reduce the mass of the vanes so that the selector lever springs in 
the selector would not have to move so much mass. This enabled them 
clever German folk to run model 15's at 100 WPM with more success and 
reliability than we over here could do.

A neat feature found in many Lorenz 15s was that there was often a 
perforator/reperforator driven by the selector which nicely punched a 
tape of the incoming signal, or whatever the 15 was printing at the 
time.

You might have a relative rarie, Mr Tighe.

73,

George - W7TTY