Here is more confusion:
In the first paragraph as to the mentioning of:
a 'Red'-and-'White' DIAMOND herald (NOT OVAL) of The Pacemaker Service.
AND
In the beginning, of the last paragraph;
"The original Pacemaker cars were green."
BUT, there are/is no other descriptive mentioning of the type of railcar(s") and no mentioning of dates.
I tried to E.-Mail Mr. Ken Kinlock, the author, but to no avail.
Maybe someone else will try to communicate with Mr. Kinlock.
http://www.ominousweather.com/NYCLines.html
Ralph