[GreenKeys] UPPER and LOWER case

[Jim Haynes]

On Fri, 4 Sep 2015, Geo. Hutchison wrote:
>
> The model 15 could be found with upper case J as an apostrophe on US 
> machines.
>
> Upper case J on a foreign 15 is a BELL Code.

Upper case J is the BELL also on Western Union machines, with apostrophe
on upper case S.  I won't go into the origin of this unless someone
asks.
>
> The model 26 was never really suitable for press service because the R and Y

Well was intended for light duty, as are the 32/33, and press service is
certainly not light duty.

> The model 26 was only equipped with a Holding Magnet selector, while 14's and 
> 15's were equipped with either, depending on what point in history they were 
> made.

Or what the customer ordered - I believe both were available through the
end of production.>

Western Union seems to have had some Model 15s with low-voltage selector
coils.  This we learn from the Teletypewriters for the Deaf manual.
Maybe that was to allow them to use Model 32 Telex call control units
with 15s.  W.U. did things like that.