Gray M-4321 marked Victor R=00 small logo marking asking $225 there is a thin chip on the top surface and a repaired area on the back of the top mostly on the underside of the top along the rim . The lower skirts are in good shape . The huge pin is original and cemented in Only a handful of larger four part insulators are known to exist with the R=oo marking in a gray glaze ... this piece will need to be picked up or delivered to a show Please contact me privately about delivery options please contact me for any additional details description photos you may want . This piece came from the Idaho Silver Vallie area near Kellog, Idaho and was used at 60kV on early Washington Waterpower lines in the 1910 era