Check the listing for details. 1934 NY Washington RPO Postal Card Die Slick Zinc Die Casting Advertising (C085). Listed at 14.99 USD. A 2¢ U.S. postal card bearing a New York & Washington R.P.O. Train 102, November 23, 1934 cancel, addressed to G.W. Smith & Sons, Inc., Dayton, Ohio. The message side is a pre-printed business reply card for Die Slick No. 9, a zinc die casting lubricant, with the period advertising copy intact and reply fields unfilled. Appeals equally to RPO postal history collectors and industrial advertising ephemera collectors. Light age toning, both sides clean and legible.