GP35 727 by Frisco.org Posted on April 13, 2017 GP35 727 GP35 727 at Kansas City, Missouri in April 1975 (James Primm II). This entry was posted in Slides and tagged 727, Electro-Motive Division, GP35. Bookmark the permalink.
I find it interesting that the horn on 727 is NOT a 5 chime Leslie, as was typically used on Frisco road units.
From other photos of 727, it looks like this 3 chime horn was installed from( at least ) 1975 to 1978.
1980 photos do show the expected 5 chime Leslie.