In previous posts I suggested the insulators embossed with a "7" or bar are typically thought to be manufactured by the King City Glass Works (KCGW). Post No. 27 shows beautiful CD 151 "7" insulator found in Virginia.

CD-151 "7" (Front Skirt) / "7" (Back Skirt) - Deep Yellow /Forest Green With a Snow Fall of Small Cull Stones.

This insulator was found on the Norfolk Southern Railroad North West of Richmond, Virginia. I will also post an enlarged picture with the dome backlit to show the beautiful snow in this CD 151 telegraph insulator [id=606950649].