For "State Street Bank", I want to find a url showing the stock symbol
and exchange before "STT" at "NYSE" and the date of the change.

According to this page at the NYSE they started trading on Feb 14 1995...
http://www.nyse.com/about/listed/stt.html

Still looking for 'prior' info...

Goog Luck!

Here is a link to an abstract from the Boston Herald that refers to
the State Street Boston Corp (Which I beleive was the holding
name/company for State Street Bank at the time) with a ticker of STBK.

Here is a reference from the New York Times.
http://query.nytimes.com/gst/fullpage.html?res=980CEFDF1739F933A15754C0A962958260

Here is a response frome the State Bank Information people that I
emailed on your behalf:

The stock was listed as NMS which is a HUGE topic...
Here is a link to explain some of it but perhaps one of our more
seasoned market people here can give you a quick summary if you need
it!

http://www.arnoldporter.com/pubs/files/Article-SEC_Proposes_Regulation_NMS(6-04).pdf

Hope you find this info useful...

Good Luck!

Here is also the response to an email I sent to State Bank for you:

"*****,
STT began trading on the NYSE as STT on 2/14/95.  Prior to this, the
company's common stock was traded on the NASDAQ under the symbol
"STBK".

Thank you for your inquiry,
Mike "