CD-156.1 AM INS CO Light Green-Aqua Glass Insulator ~ Base embossed: AM INSULATOR CO ~ PAT SEP 13 1881. These are getting more difficult to find especially in clean un-dug condition. Color leans more toward very light pastel greenish aqua. Condition: Exceptionally clean shiny glass throughout ~ Under-poured inner skirt with associated open bubble - two shallow 1/8" hot glass bumps one just above the upper wire ridge and the other center skirt - one tiny 1/8" crescent moon dome ping - very minor flaws and a wonderful telegraph piece seldom offered for sale anymore especially in this clean shiny condition. Price $110 shipped continental U.S. ~ Money Order or Check