Prototype went east from St. Louis across the MacArthur Bridge around 11:00 AM on 9/17/2021 along with 10 other locomotives in the movement. They were possibly headed for sale, lease or something else.
Hope it was a happy birthday! The 600's paint fades badly and really shows its age while the 700's paint has remained bright and true for well over 25 years (since 1996 or so).
