[GreenKeys] Navy abandons M28 compatibility

[COURYHOUSE at aol.com]

Wow. did not realize there was an upper lower  case machine that   early!
I bet   they are  scarce!?
Ed#
 
 
In a message dated 6/8/2013 11:33:52 A.M. US Mountain Standard Time,  
nagle at animats.com writes:

That was originally for backwards compatibility with Morse code.
Morkrum's  first machine, the Blue Code machine (1910) had upper
and lower case  characters, with three shifts, LOWER, CAPITALS,
and FIGURES, and a 3-row  typewheel.  But printing telegraphs
were originally used only on main  lines, so the same message
would also go over a Morse link.  Lower  case info was lost
in Morse transmission.  Western Union asked for  machines
without lower case, and that's how it all started.

John  Nagle

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