O'hara Waltham Dial Co., Inc. Case Trademark Trademark Manufacturer: O'hara Waltham Dial Co., Inc. Manufacturer Years Active: 1890 - 1930 Trademark Markings: O'hara Dial Co. Waltham Mass U.S.A. Paris France Trade Mark. Other O'hara Waltham Dial Co., Inc. Trademarks