"PP" marked but the glaze filled the embossing area..so unembossed ... Looks dark in spots but it is a pretty dark green..Green mini Cable U number ?? $25.00 shipped..This is a hard to find cute little power cable insulator that is very scarce and I used to buy these from the local linemen 40 years ago. Even then they were scarce...Only about 2 3/4" tall and 3" dia. skirt..a bb ding on the top that affects the glaze only. View the original to see it..Comes out of my collection. ..VNM condition.