Elkhart, Indiana, is believed to be the location for this July 1966 view of EMD GP-40 No. 3035. When delivered in 1965 this 3000-horsepower unit was classified as DRS-16a, later reclassified to EF-30. The next unit in the lineup, No. 2192, is a 2250-horsepower GP-30 delivered in 1962 as No. 6119 in class DRS-13a and later reclassified to EF-22. Both units carried their NYC numbers into the Penn Central roster. The transparency is probably the work of Dr. R. D. Leonard.