I recently purchased a DGG CD 121 from a trusted collector. When I took a picture comparing it to a DGG plate, like Howard does in his auctions, it was a match. I was then told by another collector that DGG didn't exist for most McLaughlin insulators prior to the 1999-2003 price guide! I have a question about DGG pieces I've posted on ICON. The question is if an insulator doesn't fluoresce under a black light is it DGG? My plate glows like crazy, but the CD 121 nor any of my other DGG insulators do not fluoresce.