I attended the Shenandoah Valley Insulator show on Aug. 10th last week. A few of the goodies I brought home were a pair of marked PRR U-179's, a U-94 OB mine insulator, a great glazed U-231 NN Pittsburg, U-624 OB in gray, U-627B NN Knox "yellow jacket", and a gray CD 126.4 W.E. Mfg. Co./ WU