| UP Omaha GP20 335 at Council Bluffs, Iowa on an unknown day in October 1963, Kodachrome by Dick Rumbolz, Chuck Zeiler collection. Number 335 was built as UP GP9 335 in September 1957 (c/n 23691), retired June 15, 1981 and sold to Precision National Corporation. In October 1965 it was sent to EMD for application of EMD's own turbocharger, becoming one of 27 UP cab GP9's so upgraded to 2000 horsepower by EMD. Please see: http://utahrails.net/articles/up-gp9-turbo.php Threre appears to be a conflict between the photo date and the upgrade date, and I will research that, but I stand by the photo date based on the Kodak date stamp and the pencil notations on the slide frame. |