Seven NIA National Show Commemoratives, $125 postpaid: White and Harvest Gold (made for 6th NIA show in San Diego, 1975), light blue (made for 7th show in Berea, OH, 1976), light green (made for 8th show in Lakeland, FL, 1977), red (made for 9th show in Reno, NV, 1978), light brown (made for 1979 show), Black (only 20 made for 1993 show), In 1974, R.E. (Dick) Alumbaugh, who was a procelain insulator collector, though it would be nice to have a porcelain commemorative made in honor of the National Insulator Association conventions.  He approached the hosts of the 6th N.I.A. Convention, Addie and Maury Tasem, who advised him to take it before the N.I.A board.  The board met in Oroville, California at the Western Region Show held August 21-23, 1974 where approval was granted for the first N.I.A commemorative. Originally Dick was going to use the Cutter tree insulator as the model.  After N.I.A. approval, the Cutter family withdrew their support, and a new design had to be selected.  According to the 1998 National display handout compiled by Hunsaker and Lawless, after some preliminary attempts, including "two U-293s" being made in white Dresden China, the U-390 design was selected.  The model used was a U-390 belonging to Dee Willett.  In the Drip Points Newsletter of June 1975, it is indicated that the insulator was about 12% smaller than the model.  A steel mold was designed and plaster of Paris casts were made from it.  The insulators were hollow and felt was glued to the opening at the base.  They were manufactured by H.P.C. Co. of Sissell, California.  Lettering on the insulators was embossed with serial numbers either ink stamped or incised.