Strasburg Railroad passenger coaches are currently painted maroon with black roofs and the railroad has apparently used that color scheme for a considerable number of years. What I need to know is during what year(s) were Strasburg's passenger cars painted yellow with black roofs and during what year(s) were they painted green with black roofs? I've looked at the Strasburg Railroad website and also a few books on the history of the Strasburg Railroad but haven't been able to determine exactly when the passenger cars were painted yellow, and when they were painted green. Somebody, please let me know. Thanks in advance 
Btw, which of the colors, yellow or green, were used for the most years by the railroad and were there years when coaches of both colors were in service - if so, during what years?
