When were the F3A units horn changed from single to multi-chime? Did the F3As come with anti-glare paint on the nose? Did the F3As have the large numbers on the car body side of the nose? If they did when were they added?
Check out the following for information on horns. http://www.frisco.org/shipit/index.php?threads/ron-chamberlain-horn-data.4164/#post-28196 Anti-glare paint was on the nose. Number boards also on the nose from EMD new.