Listed here is a group of three CD 147's. Embossed Oct 8th 1907 - Back Patented. Starting left, insulator comes in aqua, has the slightest roughness on inter-skirt. Middle comes in blue looks nearly as Hemingray Blue, see no issues. Right is green with a little aqua, milk streak and has nice pot stone 1/4" long or larger. Insulator has a 3/4 ISC. besides that perfect. All three are very clean and shiny. I'm asking $9 for all three plus postage