Up for sale I have a CD 156.1. Patent-Other [010] Base embossed PAT SEP 13 1881. In blue aqua. I believe this to be made by the American Insulator Company. The threads are mis-shapen from the collapsable plunger. The only damage I can find is a 3/8" shallow chip under the upper wire groove. $45.00 plus shipping. I accept personal checks, cashiers checks, money orders, and PayPal using the "gift option".