This picture shows the CD 127 no embossing insulator which is MLOD / button mould with a W / 1 in a circle on the dome and the CD 127 W.U. Pattern. Both are believed by most to be Beaver Valley, PA production. These were both found on the Central of Georgia Railway telegraph line near Albany, GA. I was lucky enough to find a few of the CD 127 WUP's, but only found one of the CD 127 No embossing W/1 insulators.