I am a new member and think this site is great. Though no longer used, I recall the subway Conductor Uniform circular sleeve patch marked "t.a." worn in the late 1960's. There was another rocker/cresent shaped patch in the same colors, sewn just above the "t.a." patch that is the focus of my question. What did the lettering say (e.g. Conductor, Instructor?) and where could one locate an old one to purchase. Thanks.