Most noozle companys, as they improved their spring shut-offs sent different ones out to the service station equipment companys who installed the pumps so you might find a large variety of noozles on pumps. or if it was given to a farmer they might put anything on them for him. so to say exactly is very hard. I put them on my pumps as I find them and they appeal to me. the older clock faces I try to stay with the brass, the 40ties pumps I use the nickel plated ones. good luck.