Air vents on K2s and Js

NW Mailing List nw-mailing-list at
Wed Apr 13 12:07:20 EDT 2011

Does anyone know when the air vents were added to the front of the
streamlined K2s and Js? I'm looking for an approx. date. I've
narrowed it down to sometime between 1953 and 1955 based on photos in
the archive but I can't get it any finer than that.
Joe Giannovario
O Scale Trains Magazine

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