[GreenKeys] Re: Model 15's

[Don Robert House]

>Don, What would be your guess as to the number of Model 15's left in the USA
>and what percentage go to the landfill each year.
>Don Mehl

OOOH NOOO not the landfill.  The model 15 exceeded all of the 
production of other models.  About 200,000 were built over the years. 
Many machines were trashed in the past 30-40 years but the ones 
around today are finding homes.  If they lasted this long people are 
trying to find homes for them.  I would hazard a guess of about 2,000 
machines remaining around the world*.  Most are KSRs.  I figure only 
about 600 of them are ROs.

Model 19s do not seem to fair as well.  The machines are so large it 
is difficult for people to hang onto them.  Probably about only 200 
of them still exist.  These guesses are based on the numbers I have 
found over the years and extrapolating from that and what others tell 
me.  Models 10, 11 and 12 probably only number less than a dozen all 
together.  I only know of one M10, one 11 and two 12s.  Doug 
Alderdice and our museum each own a mostly complete M12 KSR.

The Smithsonian has an example of two of the first alphabetical and 
numerical printing telegraphs... The House Machine (Vermont) and the 
Hughes Machine (Kentucky) , both date back to 1846.  The only earlier 
model was the Morse-Vail morse code tape printer, but it only printed 
dots and dashes.  Of course, there are the Edison Tickers.  Probably 
only 12 to 20 of those exist, although a company is reproducing them 
and selling them to rich investors as toys.

M15s by Teletype and Lorenz are still being used commercially in the 
Ukraine.  Model 28s, 35s, and 37s are still used in Russia. A few 
M32s, M33s, and M43s are still in use for Numerical Control systems. 
The only machines we cannot seem to find anywhere are the paper tape 
Dataspeed machines and the Model 42 KSR and 42 5-Level Reader Punch.

On another subject, we received your book on SIGTOT.  I have found it 
to be absolutely fastinating. Thank you so much for the donation.

Don
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Don Robert House
North American Data Communications Museum
URL: http://www.nadcomm.org
Computer Museum of America
URL: http://www.computer-museum.org