5 photos above by Eddie
Gross,
used by permission,
thanks!
http://www.railroadmichigan.com/msou.html
Originally Lehigh Valley #166.
To Precision Engineering (Dealer) - 1969.
To Steelton & Highspire #66. - 1969.
Refitted with Blunt style trucks (making it appear to be an S-2, but
it is not).
To South Buffalo #66.
To Michigan Southern #66.
Here is a photo of 166 as South Buffalo 66.