"Regional Postal Director John F. Dee (right) and St. Louis Postmaster Claude I. Bakewell (center) introduce "Mr. Zip" to William E. Cornelius, assistant comptroller of the Union Electric Company. The cartoon figure is on display in post offices throughout the country to call attention to the new ZIP code system introduced this month. The Union Electric Company is one of the larger users of postal service in this area, mailing 30,000 first class pieces a day and accounting for $350,000 in annual postal revenue."