I do not collect vintage signs that are associated with the city of New York's transit system too often; however, I came across this vintage decal that I believe saw service in a train car on Staten Island. Personally, I have always been fond of that classic "M," and, since this is from my hometown, I had to acquire it, since it caught my attention. Below, is a picture of what it looks like.
Note that the decal is labeled as S.I.R.T.O.A., which stands for Staten Island Rapid Transit Operating Authority (now known as the Staten Island Railway). A really great decal and piece of New York City's transit system history.