[GreenKeys] need help identifying a teletype-built stock ticker

[jhhaynes at earthlink.net]

Teletype definitely made the stock ticker, circa 1931.  It replaced the
earlier glass bell jar models.  It runs on start-stop code, six level as
I recall, and probably 60wpm.  The typewheel positioning mechanism was
later used in the Model 26 page printer. Western Union also had a tape
printer, the 401A, made from that mechanism.  I don't know if W.U. made
the printers from recycled stock tickers or if they were a separate 
production.  I may have some more information I can pass on when I get
home.