Hello, I'm new to the forum and doing some research on the NYC subway for a novel I'm writing and have been trying verify whether or not there were public address systems on the subway cars in 1936 and or when they started to use them. I've tried the subway museum and not had any luck getting an answer. My own research has turned up some information on subway car (#484 an R9?)) in use during the early 1930's was the first car to use a public address system but I don't know if it was built with it or built in later. Does anyone know or can you direct me to a resource to find out? It's not a key plot element in my book but I like to get background elements correct and don't want to have a PA system in place if they weren't. I'm also curious what conductors did to notify passengers about the upcoming stop(s) and what passengers did to see what stop they were at in the 1930s and subsequent 40's. Any help would be appreciated.