This insulator is a CD 272 embossed on the front; Whitall Tatum Co. No 511A 16 and Made In U.S.A. with their emblem that is partially blotted out. It is the [005] listing in the book. The insulator is a dark red amber color that shows the red best in direct sunlight. The insulator is in very near mint + condition with no chips or cracks. Priced at; $50.00 plus shipping cost. Thanks.