[GreenKeys] 28 stock ticker?

[Jim Haynes]

So far as I know there was no ticker between the circa 1930 model, the
black cube, and the "900" ticker circa 1964.  Around Teletype we called
it the Model 37 ticker because it used the aggregate motion mechanism
that was to be used in the Model 37 page printer; but I guess the Bell
System didn't want it called that.  And it did have some parts similar
to Model 28 in the selector area.

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