A fine looking CD 138.2 base embossed THE STANDARD GLASS INSULATOR CO. BOSTON MASS. This one came right out of the Boston area. As you can see, it is a fine looking, light blue insulator. There are a few shallow scuffs on the dome and a couple of pings. At the base of the threads there is a shallow chips nearly 3/4" long. I`ll post a second photo showing the outstanding base embossing and also the chip. This will make a handsome addition to any collection. Very fairly priced at $75.00 and that will include the shipping cost.