I cleaned up some of my finds the bluish colored Hemi on the left. I asked Bill he said it looked like a blue Hemi thanks Bill. Anyone else would like to put in input if so thanks. The bluish colored one says HEMINGRAY on both side of the skirt, under one of the HEMINGRAY words is No. 40 .Thanks for any more info folks. Regards Wes...Always like the history side of these insulators.