Offering up a complete set of NIA 10TH anniversary CD 257 commemorative insulators. These were produced in 1983 by the McDougalds, commemorating 10 years of the National Insulator Association. Just an awesome set. Each is embossed on the base: NATIONAL INSULATOR ASSOCIATION / 10TH ANNIVERSARY 1983. The colors, left to right in my photos, are: Peacock Blue, White Milk, Honey Amber, 7-Up Green, Red. All are in mint condition. Asking $250 for the set. Actual postage will be added. Probably a large flat rate box, hopefully. Thanks for looking. Please ask any questions.